Fighting Back Against Messenger Popup SPAM

An anonymous reader asks: "I recently re-installed XP (out of boredom and not necessity) and forgot to turn off the Windows Messaging service. Things were going fine, until today. I started getting those annoying popups again. I realize that I can turn off this service and I'll no longer get the messages, but, I want a way to 'take back the internet' and not have to worry about others getting these messages either. Normally, these messages are the typical University Degree spam, but the last one I got was for a piece of software that turns off the messaging service. And as everyone knows, there are some people on the net who'll pay for this. So, how can the people of the net fight back to ensure that these messages stop, and more importantly, these people stop preying on the less-technically inclined?"