CPAC, the conservative PAC, canceled Milo Yiannopoulos when was planning to speak there.
I don't blame them, because Yiannopoulos was always acting in bad faith. If one of his talks hadn't gotten canceled it would have been a personal failure on his part and a clear indication that he didn't go far enough and would have to be even more offensive next time. The point with Yiannopoulos was that he'd get canceled, get attention, find some fool who would pay even more to hear a "controversial" speaker, and repeat the cycle. CPAC wised up to what is going on.