Nick Coleman: In the Coultergeist's wake, a teachable moment Ann Coulter is gone, but now we're having fun. Because listening to her is like hitting your head with a hammer: It's fun when she stops. [...] What have we learned, class, about free speech after listening to Coulter call Democrats traitors to the country, threaten to give a Muslim student's name to homeland security and toss insults faster than a kid with a Dixie cup full of fish parts can toss herrings at a seal exhibit? Her herrings are all red. [...] At St. Olaf, Coulter's ugliest comments were returned...