Generally I think that most people just don't realise they are being inconsiderate. They only think about themselves, and to hell with everyone else. I always try to treat people as I would like to be treated, but throughout my life I've been constantly disappointed that other people, including friends, just don't behave the same way. I'll go out my way to be caring and considerate of other people, but it often doesn't get returned.
When it's bin night I will always put my bins out by around 6pm, but my neighbours will always wait until just before they go to bed at around 10pm - and their bins are right outside my bedroom window. It's okay if I'm still watching TV, but if I've already gone to bed it's annoying.
The neighbours across the road (and once again right in front of my bedroom window) regularly have friends over for dinner. They are never noisy during the night, but when it's time to leave everyone stands outside for ages laughing, talking loudly and then beeping their horns as they leave. Why can't they say all their goodbyes while they're still inside?
I don't say anything about either thing, because I don't want to be seen as the grumpy woman next door/over the road, or cause any arguments, so more fool me I guess.