Signatures do not appear in the wall, so many campaign managers ignore no-payment for posts in that section, and most of the Merits that go to that section are people who like publishing (not forced paid posts.)
BS, in the other sections where signatures are hidden (like Serious Discussion, Ivory Tower, etc) shitposts are not merited like that.
Over the forum many users don't wear signatures or paid signatures and fortunately, they don't receive merits just because they post for free, moreover many sections are excluded from campaigns and we don't see those merit abuses there.
Secondly: I think that users are free to how them sMerits are distributed "especially those that they acquired" @theymos was not strict in exchanging Merits between alternative accounts, so unless there is any abuse from a Merit source, your grievance will not be valuable.
Wrong. Shitpost is prohibited by the rules, but you reward it in your Wall observing thread.