Absolutely, Triptych.
Can you imagine if you are a small company sending an export shipment overseas. They may have spent hours, weeks, years on a project, and you see some scum picking it up off of the beach to flog it on Ebay for a few quid.
I am sorry, but as Triptych says, whether these companies are multi nationals or one man bands these items were made by or belong to someone.
The years of being decent and honest in a situation like this is clearly lacking in many people nowadays.
Over Christmas on my normal walk, I found a lap top case and a brief case that had been obviously thrown out of a car - clearly stolen . I didn't hesitate to look through it to find the owner's phone number and he collected it within 2 hours. It didn't cross my mind to see if there was anything in there nickable so I could flog it on Ebay.
It was not law for me to retrieve the cases from the ditch and then to return it, to me it is just the common and decent thing to do.