I'm so sorry that happened to you. You would be well within your right to delete all the art you've uploaded and just keep all your characters and any art you commission close to your heart. It was an honor being able to know your characters before this happened.

You could request for that art to get taken down on account of you being the character owner and them using her without your permission. I think you're grossly exaggerating the 'degeneracy' of this community simply because of one bad incident that you could not only get the artwork down by reporting it, but even get that person in trouble if they keep at it.

I've been here since 2013(On my main account  Cheetahs ), and I've been far more exposed to all types of people because of comms, the size of my gallery, kinks etc. I had a few bad run-ins with some people, but not nearly enough to generalize it in such vile way. Especially when you also mentioned its good side. In the end it's up to everyone to decide which side of the glass they see, but I'd take your friendships and positive experiences in far higher regard than just this one rotten one.

Do what feels right for you in the end. It's certainly an unpleasant situation. But there are ways to deal with these people. Efficient ones that some of my friends attested to their validity. And I trust them. Haven't had it happen to me yet, but when it does I won't let a rando weirdo spoil my party that's for certain :P