I had a quite surprising experience a couple days ago; I noticed a [[CAT:RFU]] for one [[User:Badassfatass]], who had been username-blocked. As is common in such cases, he yelled CENSORSHIP and HOW DARE WE. I pointed him to our username policies (the original blocker had neglected to put the username block template on his page), and he said "Fair enough. I will make a new account with a reasonable name".
I guess the moral is, "at the very least, please put up the uw-ublock template if you're going to username-block someone."