Why do some blatantly disregard the fact that you hate their guts?

Question

Is this some sort of mental disorder? Delusion, Ego, Narcissim?

Even when you spell it out to them, they think you're joking!

Answer 1

They do it to drive you crazy.

Answer 2

You mean that guy from the previous question. If a guy really hassles you, they must be doing it for entertainment. i do think it is narcissism too. and a desire to annoy you.

i do't think they are clueless, rather, they are pretending to be clueless.

Answer 3

Why should anyone give a d**n who you hate? That's your problem.

Answer 4

I do that to everyone. I'm very lonely <weeping><weeping>.