Couple of comments/suggestions:
1) Only offer a 'like', thumbs-up, or thanks. No 'dislike', no thumbs-down. That way no one is butt-hurt
2) Don't show that a post rec'd this marking. The poster that rec'd it can be notified though so that they know.
3) Don't include the number of thanks, likes, etc under the username (on the left-hand side of posts).
Related to # 3, what about removing, or not displaying, the number of posts people have ? Many times I've seen long-time members with a bazillion posts ridicule a poster - comments like "as if you know anything about fixing 'x' with your low post count" - based on them not having "enough" posts here.