Lately I've been breaking my own "don't help friends with their Windows PCs" rule. Now I remember why I made that rule in the first place.
I also have a rule like that, and I also break it, but only rarely, only if those that need the help truly look like they really need help.
I have an additional rule that says don't help anyone unless they ask for it, and thus agree to the "provided as is" disclaimer.
Actually, I think stabbing yourself in the eye is easier and less painful than Window$, but I recommend Linux.