I have not once not twice but a zillion times

Have you received about natural penis enlargement in your email? I have not once not twice but a zillion times. Me, a lot.   I keep wondering how these mails are finding my email address. How does this mail even reached my inbox. I always go to secure sites. My friends have first-hand experience with this as well. I tried adding them as spam but the next morning I still get the messages on my inbox. I also tried changing my email address and lo and behold I have a different spam message. I need suggestions, do you have one? I read an article that these spammers buy email address from websites and then they send those innocent email addresses with scandalous mails such as penis enlargement exercises, or want to have a bigger penis, or do you want to last longer or cheap pills for sale, replicas or rolex replica watch, or view my webcam, and so on and so forth. In another the site that we sign up to is the spammer and we are just in their mercy whether or not they make a buck with our email addresses. What should we do? What should we do? Anything we can d about this? Or do we stand by and do nothing,let this problem run rampant over the web ? Where are the cops in the web who can help police it? Should we not cry out for abuse and cry out for help to whoever can deliver us from this intrusive sending of messages?