Protect your email address when you post it. Never respond to spam. The replies usually bounce. What's more, the spammer can use your reply to confirm that your address is active. Filter your email.
Filters look at messages and take actions according to what they find.
Many free email programs will filter mail. Just instruct the program to delete any mail with a spammer s address. Responding to spam does take some effort at first, but once you get a little practice, it can easily become a regular part of reading e-mail. You'll be doing a tremendous public service if you simply pick ONE of these methods and do it on a regular basis. Pick the one that you find most convenient, or that gives you the most satisfying feeling of revenge.