If you do this then you should mention it in your review, as another punter may not get the same experience as you.
I personally think it gives us a bad name, and think it's a bad precedent if every forum user has to name check the website to keep the reviews accurate, and think it's a cuntish thing to do, to imply the threat of a bad review over a WG's head by mentioning UKP (unscrupulous punters with nothing to do with the forum might demand extra time or extras, including bareback even). Yelp and yell are bad enough.
But if this did happen more frequently, the only effect on myself is, I'd just give less credibility to reviews from a punter who told the WG in advance they were on a forum where they might review them well or badly depending how the punt went.