A few years ago, I had the same issue. 99% of clients on the forums were guys I wouldn't want to see. I took the extreme step of getting all reviews deleted on a certain site, which lead to a few call from obnoxious guys asking why there were no reviews on said site. These, again, were people I didn't want to see. I also posted some blogs about not offering PSE. This caused a few guys to cancel, which suited me fine, as they would only have pissed me off. I have since gone back to advertising PSE, now I have weeded out the dross.