If anybody finds an avatar offensive for any reason then it should be removed.
I've seen people here try to get away with using pictures of Hitler or Stalin, or Nazi symbology,.. and that's not cool either.
In the end it's only an avatar, and not being able to use it is definately not the end of the world. There's plenty of forums where if you want to use an avatar like that no one's going to say anything, and you're free to take it there.
But if someone here says "Yo! Not here!" then take it down, get over it, and grow up.
Native XWA.Netter (Nutter?)