MIL Apartment, shared internet and mailbox?

[Jack B.]

My MIL apartment just rented includes utilities. I didn't promise anything, just told him I would consider sharing my wifi with him. Clean record, guy in his 50's, good credit. Still I worry about what someone else is doing on internet in my name. I've considered daisy chaining another wireless router to broadcast two SSID's to separate him from my files, but his activity still traces back to my name. I could even buy a more modern router to just broadcast two SSID's off the one router, but still, this just keeps him from viewing my files and traffic.

Nothing in the lease says I include wifi or cable. I could just tell him after looking into it I decided not to pursue it, and give him a $50 credit for getting a hot spot. Or even no credit, rent is already $100+ below market.

The mailbox is a similar issue, though not as serious. I could just get his mail and put it in a special mailbox for him on his porch.