This way you're going to receive only the real spam (that doesn't give a damn about any CAN-SPAM act) and stop all the legitimate newsletters you could easily u

This way you're going to receive only the real spam (that doesn't give a damn about any CAN-SPAM act) and stop all the legitimate newsletters you could easily unsubscribe from... not to mention false positives that just talk about "unsubscribe" for any reason.