That neither marks it as spam nor does it unsubscribe me from the list. 99% of the time the message falls into at least one of those categories, and 99% of that, they fall into both spam and something I want to unsubscribe from.

I don't need three or four clicks to get rid of troublesome emails that I never asked for. Gmail has a handy "report spam" that covers 99.99% of every unwanted email I get.