You know, I've thought of this before but those animated signatures some people have (this one is a particularly egregious instance, no offense to the poster) are seriously irritating, especially when it ends up positioned with two posts in immediate succession so you're forced to see more then one at a time on the same page.

It's not an enormous deal or anything, but if I were the mods I'd consider making some sort of rule on how much flashy stuff you can load into your signature. Even for me it can kind of hurt my eyes in some cases, and I could see for somebody with sensory issues it would be a real problem. Just something to think about.