If it's the current avatar you're now using, I have no problem with that (it's about the same as
TLS's, only more humorous than serious), but we're not going to make some hard rule. If people start trying to out-do each other with political avatars and it becomes a problem, then it's going to get cracked down on. If someone goes way over-the-top with an avatar or sig then we'll ask them to remove it. Drawing a definitive line in the sand only gives people an excuse to inch as close to that line as possible, which isn't acting on good faith, it's being an ass that barely tries to stay within the rules.