I understand very well why you feel annoyed.
The difficulty is knowing how to prevent it happening again.
Whichever neighbour was cheeky enough to fill your bin with their rubbish and wheel it out for collection while you were away from home is unlikely to see your point of view.
Here the bin would be left by the bin men, as we are not allowed to put polystyrene in any of our bins, but have to take it to the dump ourselves. This is due to particles of it making it harder for the men to clean their lorries.
Have you somewhere indoors where you could put your bins, next time you are away from home? A locked shed or garage? This is the only solution I can see.
You could write the following old song out and pin up by your bins:
"You can't put your muck in our dustbin, our dustbin, our dustinbin.
You can't put your muck in our dustbin, our dustbin's full.
There's rats in't, theres cats in't, there me faither's old spats in't.
So you can't put your muck in our dustbin, our dustbin's full!"
What were the first ever records that you bought and when?
Parents-in-Law. What do/did you call them?