cyber bullies

Hi Everyone! There is this guy who thinks I did something I did not and has posted insulting comments in my channel calling me names and defamation. When I asked for proof of his accusations, he just keeps insulting me. Does anyone know what is the YouTube policy for cyber bullying? I...

Okay so here is the deal, I have a cyber bully who happens to be a Youtuber. I have been begged by a lot of my subscribers to make a video exposing them. I will not be claiming anything that is not true, so I don't think I could get in trouble for that. Mainly my concern is, I do not want my...