You've heard of the bat signal—now get ready for the cat signal. A diverse crew of Internet businesses, advocacy groups, and lawmakers has banded together to create something called the Internet Defense League. The organization seeks to save the 'Net from bad laws like SOPA. And a cat signal—modeled after the signal used to rouse Batman each time Gotham City is threatened—is what the group will use to alert the world when it's protest time.

When the SOPA blackout day helped convince Congress that the Stop Online Piracy Act was a bad idea that would threaten Internet freedom, it showed how democracy can be used in the digital age to preserve the interests of people above the interests of corporations lining the pockets of politicians. But can the Internet rally to save itself each time it's threatened?

Enter the cat signal. A piece of code supporters of the Internet Defense League can embed in their websites, the presence of the cat signal will tell you another bad law threatening Internet freedom is making the rounds, and that it's time to call your local member of Congress. The cat signal is also being broadcast today on sites like Fight For the Future to announce the Internet Defense League's creation:

Yes, the signal was inspired by all those funny cat pictures on the likes of reddit and I Can Haz Cheezburger (two of the founding members of the Internet Defense League). But the League has prominent members who take Internet regulation very seriously.

"I recently gave a talk about being Batman or being Batwoman for your respective Gotham," said Alexis Ohanian, cofounder of reddit (a sister company of Ars). "This is like a call to arms for all the people who are creating something online. Whether they have a Twitter account with 20 followers, or they have a website with 35 million visitors, they all have a Gotham, so to speak, to protect. They all have a community they want to keep strong."

Internet Defense League founders said spotlights will be used to project actual cat signals into the sky today at live kick-off events in New York City, San Francisco, Washington DC, and Ulaanbaatar, Mongolia. But the cat signal will more importantly be a digital signal that can be planted on websites to protest future attempts to censor the Internet.

"This digital signal is a critical component of how IDL works; it's code that lets any website or individual broadcast messages to their personal networks in an 'emergency alert system,'" the group said in its announcement. "When the Internet's in danger and we need millions of people to act, the League will ask its members to broadcast an action. (Say, a prominent message asking everyone to call their elected leaders). With the combined reach of our websites and social networks, we can be massively more effective than any one organization."

reddit is just one of many members in the Internet Defense League. It also includes a Tea Party activist, Mozilla, WordPress, Fark, Imgur, Tor, BoingBoing, Craigslist founder Craig Newmark, advocacy groups like the Electronic Frontier Foundation, and Marietje Schaake, a Dutch member of the European Parliament (which recently rejected the AntiCounterfeiting Trade Agreement). Congressmen including US Rep. Darrell Issa (R-CA), US Sen. Jerry Moran (R-KS), and US Sen. Ron Wyden (D-OR) are also on board.

Ohanian and several other members got the word out about the Internet Defense League this morning in a somewhat chaotic conference call with reporters. (Imagine lots of noisy people not on mute and everyone trying to speak over everyone else because there's no established order for reporters to ask questions.)

Moran said he wasn't necessarily expecting Internet freedom fighters to win the war against SOPA, but thought the battle was worth fighting anyway. The protest's ultimate success was gratifying, and helped preserve the abilities of businesses to innovate by using the Internet, he said.

"We have patted each other on the back and congratulated each other for that success, but I would say these battles, including the ones specifically related to SOPA and PIPA, are not behind us," Moran said. "And Congress has the habit of doing things without much forethought, without understanding these issues, particularly these tech issues, are ones many members of Congress don't have a complete understanding of. I think… individuals with expertise, knowledge, and a passion for the Internet have a great role to play in making certain the policies developed by Congress are ones that are advantageous to the Internet, and from my perspective advantageous to innovation."

Mozilla Foundation Executive Director Mark Surman said the scale of the Internet makes it possible—for the first time in human history—for anyone to publish anything, speak to anyone, or start a business without permission from someone else, and that right needs to be preserved. "We've made a huge bet on the Internet," Surman said, calling the Internet Defense League "a group of creative people who are excited about what the Internet can be as an open system."

Mark Meckler, co-founder and former national coordinator of the Tea Party Patriots, said the Internet Defense League's nonpartisan, people-centered approach is ideal for protecting the Internet from the tendency of politicians to over-regulate. "The Internet is not the problem. The Internet is the solution, so the Internet Defense League is here to help be the solution and prevent government from intruding on that which has the chance to save society," Meckler said.

The Internet Defense League has the code ready for download. But there are questions about just how it will work in practice, such as who decides when to broadcast the cat signal, and how the decision will be made. Group leaders didn't present a specific method, but said it will be modeled on the way things become memes or viral on the Internet.

Just how to measure "viralness" hasn't been determined. But group members will hold discussions amongst themselves, and pay attention to what's happening on the Web at large. For example, if posts about a bill on Internet issues make it to the front page of reddit ten times in a row, there's a good chance the Internet Defense League would take a look and see if it's worthy of action.

One threat being monitored by group members is the Senate version of CISPA (the Cyber Intelligence Sharing and Protection Act). One reporter asked if net neutrality is on the agenda, but no specific commitments were made.

There's always the possibility that not every member of the group will agree that a certain threat is actually a threat. While the cat signal code can be automatically triggered, members can also choose to turn it on on a case-by-case basis, deciding for themselves which events are actually worth protesting.