Ok i think every site admin knows about offensive avatars and signatures and often go around editing things for something, whether this be because of nudity or language used in the places i think ipb could do a possible solution here. In the avatar area and signature are there should be two extra tick boxes which a member can tick when they modify their sig or avatar saying something like "others may find this signature/avatar offensive". Then you can check this two ways i guess, 1. being if the person is under 18 (if you have dob control for all members) or 2. have a option inside the my controls saying "turn off offensive signatures/avatars". IPB can work on the wording :P, then if the option is on either not display the avatar and signature or replace it with with a default ipb image.

If your going to have offensive signatures, maybe a spoiler would be a good idea. People would lie about their age, let them choose whether or not to see it. Just make offensive signature illegal on your board. ^_^

well exactly but if people are willing to lie to see offensive material then obviously they not offended by it :P i so side with the checkbox to turn on offensive sigs and av's over tracking by b'day.

+1 as a mod on IPS beyond