Theft versus appropriation

Finders Keepers is the way i see it?

We have had similar problems int he UK.

Is it theft by finding?
NO



Once someone leaves an item outside for collection of "Rubbish"
the owner has renounced all property rights in the object, then the property is abandoned

"Any items placed out for hard waste collection remain the property of the resident until collected by the contractor."

A quick knock on the door could solve this?
But this is just out of courtesy, the owner has renounced all property rights in the object by leaving the said property outside as rubbish!

Finders keepers!