Why hasn't Karol been banned

[Skywatcher]

@installLSC

As most Straight Dope members know, Karol has been obsessed with posting proof that the world is not round based on some photo in 1954. Here’s a typical one. He’s posted this regularly, both inside and outside of GD. Not only is his theory out there, but he refuses to hear any contrary evidence and regularly insults posters. So why hasn’t he been banned?

It’s only a matter of time:

@tomndebb

I am letting you know that if you continue to insult other posters, you will jeopardize your posting privileges, here.