1. Giving sMerit to someone should have a limit especially when two person is giving sMerits to each others.
-Two individual with bad intention can easily take advantage if they do not have limit giving sMerits to each others.
I am not in favor of putting this restriction:
1) Those who are abusing this, i.e sending merits to their alt accounts repetitively for shit posts are already getting caught. This is in fact working as an easy method to catch spammers. Admin may want to ban all this members permanently later.
2) There may be some genuine users making really good posts. All their posts might be deserving enough to get merits from same member again and again. If the rule you suggested is implemented, such members will also suffer and may get discouraged.