Well, i don't know about fp but on fanfiction this irrating pokemon fantard kept trolling me on my fics just cause she hated the parings i wrote about, sure i blocked her, but the really stupid part is that i can't segnala her reveiws just because she made them sound like reviews (In other wordS IDONTLIKETHISCOUPLEREVIEWREVIEWHWWHWFKWWL) she did it to loads of people, but hopefully she's banned now.
The best/worst was Batcountry9000. HE HATED ON HETALIA. Then again, Chiphip harassed poor 8theGreat when she was Nomycake. And then there was Ikillu/Ifeelyou/Itouchyou/Istillkillyou. He postato a picture of himself naked... *shudder*