I encourage you to check out
http://www.419eater.com, a website that documents scambaiting, i.e., you enter into a dialogue with scammers, simply to waste their time and resources. While you are doing this, you will be helping to keep the scammers away from real potential victims and screwing around with the minds of deserving thieves.
This is a heartwarming site, where you see the dregs of humanity get theirs. Well, not the way most of us WANT to see them get theirs, but it gets the job done.