I've seen faked brand emails hit my Gmail inbox with (presumably malicious) unsubscribe links, and I've definitely seen sites "forget" that I've unsubscribed.

I've seen faked brand emails hit my Gmail inbox with (presumably malicious) unsubscribe links, and I've definitely seen sites "forget" that I've unsubscribed. It's a bit of a tragedy of the commons, but I think the state of email is such that simply reporting unwanted email as spam is a rational choice