This reminds me of a trick a friend used to do: he'd collect the email addresses of spammers who'd targeted and put them into file on his website. Not sure whether that worked or not, but it's fun to imagine that it did.
Some french blogger did this to people contacting him for putting sponsored content on his website.
The text on his contact page literally start with "warning: if you want to pay me to put something on my site your email address will be leaked on this page". Funny how many people won't read any content of a website but still want to pay in order to put content on them :P
