While I support much of their progressive actions, they use underhanded spamming tactics. By signing one petition, they automatically add your email to several other lists without your consent because they don't give you a choice not to subscribe. Sneaky at best, possibly illegal. Their unsubscribe method is also underhanded: no way to unsubscribe from all their lists at once, requiring multiple actions to unsubscribe one at a time. Totally deceitful.