Ah damn, the radio shows were legendary, how they got away with saying what they did including swearing on daytime radio was outstanding, and refreshing versus the crap you hear on 99% radio stations/along with the fake boring hosts
Yeah it's just the first thing the springs to my mind, as he doesn't seem to care about the law and often mentioned how he'd open other peoples mail on the basis that they shouldn't have sent it here should they! Haha!
From what I can tell, it's a common misconception, if it's landed through your letterbox you are allowed to open it, as long as your intent isn't malicious in doing so.
If I wind up with a letter for a neighbour I'll just hold it, doesn't really seem to happen often though. Get the odd parcel in for them.
If it's for previous owners, I RTS it as I know who they are.
Anything else I think is relatively fair game for opening