And God forbid you be honest when the author asks for honest critisism. That's when it gets really sad, seeing as most will go rabid if someone tell them their work is any less than spectacular (and any friends of the authot makes things that much worse when they come to trash the honest critiquer).
OH my god. That's actually happened to me. I think it was fanfiction.net (it's ALWAYS fanfiction.net. -_-; ) I offered some chick a crit (I sent her an e-mail. It was right on her profile), and she sent her sister after me. I got flamed via e-mail. For two weeks we battled. It was ridiculous.
Makes you wanna just hate people. xP