I assume you are referring to what we call Spammers selling pills and other garbage. The site gets hit quite a bit by them and the Mods try to delete and ban them when they appear. The thing you can do if you see one is to click on the yellow Alert triangle below their username and when the box pops up just type Spam or Spammer in it and hit send. That helps keep the Mods up on things so they can remove them. I do that pretty much every morning the first thing when I come onto the site. This past week the site was hit by a bunch of Spammers.