Bianca Jagger asked, almost existentially, “How are we going to boycott #TWITTER?”

Zeynep Tufekci, an assistant professor at the University of North Carolina at Chapel Hill, took the other side. “I’m defending Twitter’s policy because it is the one I hope others adopt: transparent, minimally compliant w/ law, user-empowering,” she wrote.

Twitter, like other Internet companies, has always had to remove content that is illegal in one country or another, whether it is a copyright violation, child pornography or something else. What is different about Twitter’s announcement is that it plans to redact messages only in those countries where they are illegal, and only if the authorities there make a valid request.

So if someone posts a message that insults the monarchy of Thailand, which is punishable by a jail term, it will be blocked and unavailable to Twitter users in that country, but still visible elsewhere. What is more, Twitter users in Thailand will be put on notice that something was removed: A gray box will show up in its place, with a clear note: “Tweet withheld,” it will read. “This tweet from @username has been withheld in: Thailand.”

Think of it as the digital equivalent of a newspaper responding to old-fashioned government censorship with a blank front page.

“We have always had the obligation to remove illegal content. This is a way to keep it up in places where we can,” said Alex Macgillivray, general counsel at Twitter. “We have been working on this awhile. We needed to figure out how to deal with this as a company.”