Any person administrating a usergroup can integrate whoever they want in it, and then can change the avatar of its members without it s members approval. This is silly.
Yesterday I logged in and saw I was sporting an avatar I never implemented. Someone actually made me join his usergroup, and must have an administrator power allowing him to change the avatar of the members of the usergroup to the usergroup avatar.
Please remove this power from usergroup admins; otherwise basically someone administrating a usergroup can make anyone on the site sport any avatar they want.