As others have said, bullying anywhere is unacceptable and should definitely be taken seriously - and this is definitely something I feel strongly about as someone who has been bullied in both real life and online.
In fact, bullying online can be more severe than in real life in many cases. For some reason, people think that hiding behind the anonymity of a screen gives them the right to make others feel awful about themselves. That's absolutely unacceptable. Just because you don't know this person in real life does not mean they don't have feelings. Most people come onto FH to find roleplays and make friends, so what's the point in bullying them? You're all going for the same goal, so instead in being an insufferable jerk, how about you introduce yourself to them, perhaps.
If you have nothing nice to say, don't say anything at all.