Former presidential candidate Al Gore has joined conservatives at the Heritage Foundation and Americans for Tax Reform in expressing reservations about controversial Hollywood-backed copyright legislation.

Gore actually went a bit further than the Republican-affiliated groups: in a now-deleted YouTube video of a speech at a CareerBuilder event, the ex-veep warned that proposals to levy an Internet death penalty against allegedly piratical Web sites "would very probably have the effect of really shutting down the vibrancy of the Internet." (See CNET's FAQ on SOPA.)

Dan Farber/CNET

It wasn't clear whether Gore was talking about the House of Representatives bill known as the Stop Online Piracy Act, or SOPA, or the Senate bill called Protect IP, and the YouTube video was listed as "removed by the user" by noon PT today. The debate over SOPA in the House Judiciary committee is expected to resume this month; a Senate floor debate on Protect IP will begin on January 24.

CareerBuilder refused to provide details on where or when the event was, citing Gore's famously restrictive contracts associated with his paid speeches, and did not respond to a question about why the video was removed. (Gore tried to bar the press from his speech at the 2008 RSA Conference, even though the room was filled with camera- and iPhone-toting security geeks.)

"Under our speaker contracts, we're not able to comment," Jennifer Sullivan Grasz, CareerBuilder's vice president for corporate communications, told CNET today.

Unlike many issues that roil Washington officialdom, copyright isn't especially partisan: support and opposition to SOPA and Protect IP comes from both major political parties. SOPA's author is Lamar Smith, Hollywood's favorite House Republican; the politician behind Protect IP is Patrick Leahy, a Vermont Democrat.

Gore didn't exactly say he opposed the legislation, but did say that "anything that would serve to threaten the vibrancy and freedom of the Internet in the future, I'm against."

SOPA, of course, represents the latest effort from the Motion Picture Association of America, the Recording Industry Association of America, and their allies to counter what they view as rampant piracy on the Internet, especially offshore sites such as ThePirateBay.org. It would allow the Justice Department to obtain an order to be served on search engines, Internet service providers, and other companies, forcing them to make a suspected piratical Web site effectively vanish. It's opposed (PDF) by many Internet companies, users, and civil liberties groups.

In other SOPA and Protect IP news: