Should have bought a Dell.
I'm somewhat surprised their isn't a way to block individual users from pinging you, or an ignore feature that you can set up to immediately trash can requests from specific IP addresses. I do know that on my classroom Windows PC, the installation of instant messaging automatically had it starting up whenever you rebooted and installed a lot of adware and spyware. I found AOL and MSN instant messaging, and something called IRQ, I think that put up a little daisy in the systray. Those three programs (along with the ad and spyware) would slow down the system so much I couldn't even run Power Point presentations.