How do you work that one out? Logic, please?
More than happy.
Judging by the content of many of his posts, this thread was likely started by a guy who is trying to obtain Senior Member status for the sake of selling his account. After a second look I admit there's a chance that he just wants more BTC revenue from signature campaigns but there is additional incentive to become a Senior Member knowing those accounts sell for a higher price than Full Members.
So people go out of their way to artificially inflate their activity because there is increased demand for these types of accounts, for reasons unrelated to the promotion of bitcoin, cryptocurrency and the general welfare of the community. And it creates clutter / spam.
By removing posts mentioning WTS/WTB accounts it definitely makes it harder to sell accounts. I give you the fact you will not be able to stop the problem in its tracks, but you have to first be willing to admit its a problem.