I just can’t stand it when people pretend to be knowledgeable things they haven’t a clue about. I’m the worst offender, but at least I understand the difference between when I actually know something and when I’m bluffing. Most people do not, and still think whatever they say is sacrosanct.
It’s a reflex—one I can’t control. I try to do anything possible to drown out the voice of some clueless individual speaking, else I get really angry. Not at the fool who’s speaking, but at the idiots who actually listen.