There are exceptions to all of this, however in general, someone who joins the forum for the purpose of conducting business will also otherwise contribute to the community, but only as long as they can continue conducting business. So if something is substantially impeding their ability to conduct business, they will stop contributing otherwise to the community. Also, on its face, having the warning to trade with extreme caution is going to prevent you from trading, and as such, many people will not even attempt to continue trading. This is not the case on this forum, however many other forums ban scammers from trading and some people may have seen elsewhere that those who are "tagged" as scammers cannot continue to trade. For those that attempt to continue trading after having their warning to trade with extreme caution on their profile and marketplace posts, few are able to conduct any meaningful business.
Wrong thread?
Where does it say "extreme caution" on Anduck's profile?
It used to, and Vod even kept it so by posting a second negative rating (when someone countered his shit rating) to remove others' ability to "neutralize" it until my profile was red for the time Vod wanted. And right now he has reduced my "trust score" from dark green to yellow or something like that -- I don't even know because Vod is on my distrust list due to his illogical & dishonest conduct of rating people.