Memories of years ago on Stack Overflow, when it seemed like every single beginner python question was answered by one specific guy. And all his answers were streams of invective directed at the question's author. Whatever labor this guy was doing, he was clearly getting a lot of value in return by getting to yell at hapless beginners.

That doesn't seem like the kind of thing that's ever been allowed on Stack Overflow.

So? It is commonplace there. The comments are even worse.