I shut the thread down because it started getting personal and was no longer "suggestions."

Regarding the substance of the thread, given the amount of people that "straddle the line" between sales, support, and just plain chatting, I think it would be difficult to make people "register and disclose" all possible affiliations. Clearly is someone is being deceptive that can be a potential problem, but I think that can be handled on an individual basis. A little bit of searching on someone's posts should be able to tell you the source of the information.