A complaint does not necessarily equal an action. But if people complain, we discuss it. I know you'll probably find this impossible to believe, but there have been several complaints about HH (mostly about comments) that were dismissed w/o action.
As far as Cocaine's avatar is concerned, I hadn't even noticed it until HH brought it up. But now it's being discussed amongst the mods.
As a mod, I don't consider it my job to patrol the forums. I usually don't bother with anything that isn't blatantly egregious. If someone else chooses to be offended, and it comes to the mods in the form of a complaint, then I am obliged to get involved.
The fact of the matter is, if nobody is bothered by Cocaine's avatar, I'm inclined to not worry about it.
For the most part, skin is considered worse than innuendo on this board. We get more complaints when the former shows up. Whether or not that is right is another issue entirely. But that's the way it is. As I have mentioned, there is a variance of opinion amongst mods about how much is too much. But if you are asked to remove something, it is because at least 3 mods felt it exceeded the boundaries established for this forum.