Because I am on the site when few other people are, I am not inundated with them. They do, I agree, pop up in the wrong place - I always seen to mouse over there, too. I don't want them gone, so I won't turn them off, but I will continually wish for a different color than yellow.
I'd love to have a way to eradicate all mouseovers from every web-page in existence.
"Get the hell out of my way."