I have only had one post pulled in 6 years at FR and that was in the Terri threads.
The Terri threads were the most intense I have ever seen, here or usenet. I went to usenet and posted here at FR, what the war looked like over there so all the opus people could see that this war was occuring EVERY WHERE, things were nastier over there too.
The fact of the matter is a halfway talented hacker could trace anyone they wanted. It always amazes me the people who have keyboard courage and begin either making threats or insulting people thinking they have anonymity.