We have watched our neighbours go out on bin day and see whoever has space in their bin for their rubbish. Seemingly, this seems to be our bin they use alot, so now we wait until the bin man is right there to bring ours out.
Because principles!! We don't want anyone using our bin!!
I've had to put a padlock on mine to ensure that it doesn't get filled up with other people's excess rubbish before I even have a chance to put my own stuff in!
This drove me crazy when I lived in a flat. I'd go to put my bag out and my bin would be full. A padlock isn't a bad shout!