Oh sure, I get it. The problem is determining who is legitimate and who isn't. Since I never requested any of these spams, and even legitimate businesses will frequently send you messages even when you carefully opt out of their offer to send that spam, it's pretty much a waste of time to bother playing these stupid games with any of them (at least in the US). If we didn't have politicians hell-bent on stripping us of even the hard-won internet protections we've managed to obtain, then maybe the unsubscribe button would actually mean something here.