I thought you should know. That is all.
Considering that Hubski is okay with statements like "I don't trust white people" (made by racist user humanodon), you're in no position to call anyone racist. I've never made a racist statement, and I dare you to prove otherwise. If you can't, shut the fuck up, you hypocritical assholes.
This is awful. Making up a serious accusation just because someone doesn't agree with you is not the way to go.
So because "Accusing someone of being racist is a serious offence." and ThatFanficGuy apparently "tried naively to convince to give up racism propagation" or otherwise implied you were racist you've been offended? And as a result of those feelings you've decided this is the best course of action? You're a special one.
This is a serious accusation. What is your proof?
Nobody is going to believe you if you have no proof to stand by. You can't just say "User 'ThatFanficGuy' is a pedophile and a rapist" with no proof and expect people to believe you. That's just ridiculous.
People believe what they want, not what is true. I don't expect people to believe me, but I'm going to say it anyway: ThatFanficGuy is a pedophile.