For people renting it is routine to receive mail for several previous tenants. Everytime you throw away a credit card sign-up offer for someone else, you are committing a felony.
They didn't pay you anything to wade through their junk. You aren't their slave unless you sign.
And I don't open the mail -- that's a crime the postal service would take very seriously indeed. Sure, perhaps my practice is technically illegal, but I don't think it's the sort of illegal that the USPS would spend a lot of time and money on.
I'm not opening someone else's mail, I'm not preventing it from being delivered to the address on it, and I'm not preventing the recipient from receiving it. His death does that.
When I started receiving more than 20 mails in one day, all from the tax service to that previous tenant, I bought a shredder and shredded the entire stack of mails. Some years later, I was still shredding mails. My magnanimity to correct for government failures only goes so far.