Good point. That being said, some members, new and old, practice common courtesy and decency while others do not.
Marking old posts as "disliked" is the sign of being a true asshole, and I don't mean the type I like to eat. "Don't be an asshole" is a pretty universal convention.
To me, a new member who posts using common courtesy, common sense, and the same type of self-restraint one would use in any venue, online or offline, does all of us a service.
I'm going to guess the new member in question "disliked" a slew of old posts made by the OP, based on the title and first sentence of the OP's post. While naming the new member in question might not have been the best move, I wouldn't call it mocking him. The OP called out someone for their bad behavior.
Exactly!