I don't see anything wrong with asking trade members to keep their advertising in the trade area but I'm against heavy handed moderation of general comment from traders simply because they are talking about or possibly steering people towards products they may sell. If the trade member is answering a question and believes, for example, that bass traps are the solution they should be allowed to say so irrespective of the products they sell. There are plenty of moderators here and between them they must have enough experience to make a judgement call on these issues. If someone is clearly just touting then the moderators should act. No need to post a chapter and verse explanation - just delete or edit the post and fire as short warning PM to the poster. On PFM I've certainly taken a few traders to task when I feel they overstep the mark and I know other mods have done the same. That is why moderators exist, to ensure the smooth running of a forum and that extends beyond dealing with the usual bun fights.