I said this in another post and I'm going to repeat myself here. Social media is powerful (look at the recent Steubenville fiasco) and if you are going to put somebody out to hang you better be right. Considering she is part of the pr group for her company (developer evangelist?) I believe she has an understanding of what a twitter account with 9000 followers can do.
>Isn't this exactly what happened though?
Also, don't try to play with words, she did that and more. The sensible response would have been to tell them to stop and then if they didn't, contact one of the staff. A post on twitter saying "Conference etiquette: Sexual innuendos about forking and dongles are not cool" without a picture would have been much MUCH more tasteful.