to be perfectly honest, i don't think that changing the icon is going to make much of a difference. right now, it's not a racist comment to say "oh, look, it's another one of those black guys" on this board -- it's a figure of speech considering the circumstances that the individual who registered for the account did not put forth the effort to change his/her avatar -- and this is the default.
there are a number of decent individuals (non spammers) who have used the can of worms as their personal avatar, and there are a number of decent individuals (uh, UNCjigga--what?) who still use the black dude avatar as their preferred avatar.
either way, eventually, the mods here have done a good job removing the spammers within a given time frame, so i'm not sure if there's any use in going the step further and changing the default avatar to something different. we all know what to look for now, and there's no real reason (besides seeming more suitable) for change.