Perhaps the "big a-hole" is just a poser acting like an arrogant megalomaniac bastard with delusions of grandeur; what he needs is electroconvulsive therapy, lol... Shun him and his clubs, and keep IMVU as drama-free as possible. However, if he bullies, harasses, or stalks you (even though stalking is caring, lol), then that is a different matter.
BTW, welcome to the forum, Elli.