Like Hilder dislikes, I can't stand power-mongers who have to exert their power or display themselves just so they can appear tough. It immediately tips observant people off that they're ones feeling the least secure about themselves. (Or else they wouldn't have to make such a show of force.)

I can't stand racist haters

Liars, especially people who'll tell you one thing or promise you something and then go back on their word. Or people who'll lie purely to get what they want.

People who cheat on tests in high-stakes professional programs, like med or law school. I sure as hell don't want to go to a doctor or a lawyer who had to cheat to succeed. He damn well better have passed it the hard way.

People without the backbone to stand up to someone who needs standing up to, like a bully or someone treating another person wrong. This includes people who'll go along with the crowd and ridicule or harass someone else just because they're egged on. Or people without the cojones to intervene in a crime because they'd consider it "snitching." Asinine.

People who think everyone needs to smoke weed or think that someone who doesn't currently smoke it can't be an effective advocate for it.

Cowards

People who're so insecure about themselves--people with such a shaky ego structure--that they can't rise above disagreements and conduct themselves as adults any longer after one and instead turn into silent, petulant little pouting kids. Immaturity and insecurity, I guess, would be a shorter way of saying this.

Stupid drivers who take risks in cars that endanger other peoples lives, from chronic DUI offenders to people who don't put their babies in restraints to cell-phone talkers/texters who're too distracted to be safe on the road. Idiots.