I understand sending a virus makes me look like a bad guy, but consider black hat/white hat hackers, they're usually guys with similar skills but with different morals. Black hats are the bad guys, and white hats are the good guys. Unlike black hats, I can at least say I use my skills for good and take down griefers and stalkers who pester me, or my friends. I don't take any real honor in it, but sometimes it's gotta be done to teach the other guy a lesson.
Not only does it make you look like a bad guy, but is also a violation of US federal laws. Just a tip to be very careful and consider other options.