People don't have to do much to have you lable them an idiot. The young checker at the grocery store on her first day trying to figure out a new computer system is labled an idiot for taking 10 seconds instead of 5 to scan your things. People who wait exactly 1.8 seconds to go on a green light, instead of the expected 1.5. "What took you so long? 1.8 seconds? Everyone else here only takes 1.5 seconds. Yeah, thanks to you I'm going to be 0.3 seconds behind all day!"