Yeah, when I was in high school.

The golden rule, defined or not, is that if you piss off the admin then you're apt to get banned. It's your forum and at the end of the day you pay the bill. She (obviously) doesn't have a leg to stand on in any legal sense, so don't sweat it. The internet is full of drama queens. If that happened on my site, personally I'd put up a forum for a few days devoted to making fun of her with that PM as a sticky, but that's just me.