If it's an avatar, you would have to not see ANY avatars to make it invisible. If it's a siggy, then ignoring that person will make it invisible.

I think discussing it with a mod or admin is the best idea. There have been a few that were too violent for here, and one or two that were offensive to the whole membership also... to disagree is one thing.. these were the other thing.

Yep, discuss it with a mod.