people don't realise the effect of everything on the world. you have a kid who throws their drink out of the pram. "it's not your problem, because you're in public" so you leave it. the cleaner has to pick up the trash and clean the puddle. the cleaner is now having a lousy day and in a bad mood from lazy, obnoxious parents. cleaner, in a bad mood, snaps at his wife when he comes home. she's now upset. because one, white trash mother doesn't even think about her kid, never mind the world around her. (true story, not trying to single out/identify any one group over another)