A buddy of ours has the nickname gremlin to this day. If he touched your PC it was guaranteed to bsod or just die. he spent lan parties trying to get his PC working, reinstalling windows...etc
We had a friend like that too, actually. We all made some mumbling explanation about "electrostatic discharge" so that we felt less uncomfortable being so superstitious, but yeah people would leap in front of him to avoid him touching their stuff. But yeah, he was one of the crew, so it's not like we were gonna not-invite-him.