i am confused

It annoys the op, since they've probably forgotten they even posted it. It's also annoys everybody else who's posted because there's this setting which sends you a notification when somebody else comments on a post you've commented on.

Annoying in general really. I hate telling people to stop, but I'm getting tired of it.

I can see the argument for here, but for stuff like the fun stream, commenting on 1 month old posts is unnecessary.

I was gonna say nothing but looks like I'm outvoted :[
Don't worry, I do the same thing. I personally think there's nothing wrong with it.