This guy keeps harassing me on another site that I am on. I have not interacted with him, but he replies to my posts saying vulgar and insulting things. I don't know what he has against me, but it needs to stop. He has come back with three more accounts just to bother me. People tell me to keep blocking him, but I feel like he won't give up. I feel like he is being obsessive and I wonder what is the next step when someone won't leave you alone. It's not like on here where you cannot have multiple accounts. On this site, it's one account for each email address. So I guess he can create new accounts as long as he wants to. But it is making me uncomfortable and I just want it to stop. I don't need any more to deal with. What is the best thing to do in this situation?