Historian John David Lewis (about whom I've written here) thought he was giving a lecture at George Tech, but turns out, in the eyes of an Islamic segment of his audience, he was actually committing a thoughtcrime. He explains:

I spoke at Georgia Tech last week on "No Substitute for Victory: The Defeat of Islamic Totalitarianism." A pro-Islamic group in the audience (some at least were students) tried to filibuster the Q&A. Their attacks openly called for Islamic law (a "good thing"), praised jihad as a "wonderful" concept, and proclaimed that subjugated peoples forced to pay the Islamic tax should be "grateful" for the "protection" they receive. They whitewashed history as well as the present situation, demanded that we stop "offending" them, said that the Iranians had no reason to trust the United States, and called me a "criminal mind." This was all-out support for a category of thoughtcrimes in American universities.

His full account is here.