I had a family add my email to their family mailing list, so I’d get updates on all the kids and grandkids, vacation plans, death notices, lots of pictures, and any of those chain letters your grandmas used to send. (this was hotmail, long long ago) I probably got a couple hundred family updates.
I tried to notify two or three different people. As far as I can tell, they just added another address for the guy with the same name as me, and kept me on.
Normally I’d handle it like @zenvelo each time I get something from someone not intended me, but none of this was one-to-one communication, so I didn’t worry too much. It was just funny to me, and might have been disconcerting to them, the longer it went on.