I've seen them empty communal bins and drive away leaving a massive pile of rubbish which "missed" their truck. I imagine its not laziness that stops them from picking it up but rather "targets" and having to have them all done by a certain time. I wonder what a litter warden would do in that...
What about the kind people who leave usable trinkets outside their house so that less affluent people can get some use out of them? I saw a nice box of kids shoes put outside someones house the other day, in good nick, which could have saved a less well off family a sizable chunk of money. Would...