I guess that's the rule... I think in practice we go by a smell test. Most of the stuff that gets yanked is either clearly a company, ie ski company Y, or a kid selling something he just crocheted, someone who wants to start selling screenprinted t-shirts and posts a bunch of his ideas for people to comment on, stuff like that. Occasionally there are threads that fall into a grey area, like one of the martini bros doing marketing research via SG. Those we usually talk about in mod disc and decide whether to let them go.