This is an interesting thread.
From where I'm sitting it does sound like a revenge review. As lilythesavage and others have noted, pointed references to age etc. Although there is ane element of 'honesty' in that the OP puts his hands up to BBing her, of course the upshot is that the girl's reputation is damaged forever, whereas the OP has made one mistake and owned up to it, is now 'clean' and can move on with credibility intact. Actually, you don't know you're 100% clean until you have a test a few weeks after the act, and as ever credibility is at others' personal discretion.
Wolgagging appears to have irrefutable text evidence that she does actually do BB, but there is no phone number on her profile, and there is none stored on her UKP profile page either. Can any of the several guys who have previously reviewed her confirm that the number displayed on those texts is hers?
Regarding BB in general, yes of course we all know that a lot of girls BB with punters without openly stating, and of course many girls have partners IRL and of course BB with them. Nevertheless, it is important for punters to know which girls are offering BB to punters, because by the nature of their job they are fucking lots of different guys, so the risk level to punters who don't want BB is increased. Fucking punters BB is of more relevance than them fucking their partners, simply because of the size of the pool you're being exposed to.