Re: Neighbours throwing their trash in our bins - What to do?
None of that will work.
What you need to do, as indicated in article 1501.12 clause 5 of Swiss communal law, is
1) write a passive aggressive note and leave this by your bins
2) write a second one that you need to post on every door of every household on your street.
3) the final thing you must, absolutely must do, is go down your street and lift all the windscreen wipers of every car.
I am confident that if you do this, the problem will stop.