I thought of this question because of what I said the other day. Someone said something a bit insulting towards me (inadvertantly) and apolgised. I just brushed it off and pointed out that I have very thick skin... but I don't. Or at least, I don't in some cases, somethings always manage to get past my defenses and make me very angry/seriously offend me/genuinally upset me.
The first thing that springs to mind is the use of the word "fag". That instantly pushes my rage button, I'm damn quick to jump on anyone that uses it (as an insult to gay people of course, in case your thinking of cigarettes). I don't even care if someone says gay or queer or whatever as an insult, it's just fag, something about it makes me spit metaphorical blood.
Second thing that pops up is people hating on welfare and benefits. This more upsets me than angers me. It's generally the "poor people don't deserve anything" type thing that gets me the most. I see this as grossly insulting to poor people, it is often a view-point born of ignorance (e.g. "poor people wouldn't be poor if they paid attention in school!") and I think shows blatant lack of empathy, care and respect for the right to a decent life in a fellow human being.
So, what upsets/angers you Escapist? What always manages to slip past your carefully constructed emotional defences?