The original poster of this question "insulted himself/herself".
I'm not sure if it's allowed.
Can you tell me?
A super smart rebus
It's quite common in everyday English (and many other languages/cultures) to do this (with some words, like 'idiot' and 'moron'; there are probably words which are off-limits even in this context).
I see no reason why it should be disallowed on Puzzling Stack Exchange. We have a Code of Conduct but it mainly is about interaction with other people, not 'interacting' with yourself.