I am of the agreement that added upvote and or downvote, as well as other rating systems aren't really all that needed. The "Like", "Laugh" and "Thank" are sufficient as it stands, as there's no real reason not to post, short of just agreeing that someone either said it best, got one to laugh, or deserved a modest thanks and acknowledgment.

Carrying on, adding or removing individuals from Private Messages would be a welcome addition for "behind the scenes" on-site sort of planning.