Brian Weinreich has been trolling spammers for two years using a bot that fires realistic and ridiculous replies to the pervasive online salespeople.
The founder of San Francisco firm Density created the bot as a means to waste the time of the blowflies of the internet after being affronted by a deluge of unsolicited sales pitches directed at his "sacred" inbox.
The reason there are no anonymous comments here is that I turned it off 3 years ago - I was getting 100 - 150 spam comments a day and it was just too much work weeding the wheat from the chaff. This flips the script - making the spammers sort out the wheat from the chaff. Bravo.
Click through the link if you want his code to run it yourself.