I've noticed in my writing, and especially in email, I am one of those horribly annoying people who use too many exclamation points! I use them all the time! Perhaps I'm trying to compensate for my calm outward appearance? Anyway, I am aware of the problem, and I am working on it. I will be joining a 12-step program shortly to help me cut down on my exclamation point use.
I'm not aware of a worldwide exclamation point limit, but if there is one, I'm using yours up. Sorry about that!!