Once AI learns how to do insults it could post here and nobody would know the difference.
Lol.
Of course it can do insults.
In fact when I was first learning how to write AI Agents, I wanted to duplicate the Monty Python skit, where the clerk would alternate between being rude and polite, based on this skit. All you have to do is indicate the tone in the System Prompt.
https://www.youtube.com/watch?v=i1leDAwjtto