This is wrong.

Apparently, Ann Coulter has been basically threatened with arrest unless she tones down her act for an appearance in Canada.

Our Republic has a tendency towards noisey, content-free discourse nowadays, but (as Chomsky points out in the linked story) the US remains essentially unique in our nearly absolutist approach to free expression. This is a big deal, and it may be the most important freedom we have. I loathe Coulter and just about everything she stands for, but her views are protected speech, and she should be able to spew her vile invective without fear of arrest.

Of course, I'd prefer it if there were no market for her idiocy, but I'm not about to support censorship because I don't like her politics.