because there are some people who want merit instantly so they buy merit on someone, and of course they will work harder (more crazy spam) because they have already spent money on it.
so I think it's only a matter of time, what do you think?
If they buy merit just to get into Jr. Member they know that their account is now more prawn to get negative trust and they will now post carefully than before because they dont want to lose that account because they already spend money in it.
But if Im in that situation, instead of buying merit to someone you dont really know why dont you just spend the money on the forum and make your account a copper member? Less expensive>Less prawn on negative trust at the same time you give value to the forum and to its rules.