My family and friends do this to me, too. I worked tech support for a few different companies, so they think I should fix their stuff, too. I'm not a MR. Fix It, I'm a MS. Fix It.
I do, however, have one of those crazy Aunt Judys that is always a B and talks smack about everyone else in the family. So, when she asked me to fix her computer and offered to compensate me, I thought: "oh, alright." When she asked me how much a tech would charge, I told her $100 an hour. Every time she sits down at the computer she deletes something she shouldn't, installs something she shouldn't, or visits a site she shouldn't. I used to get about $200 four or so times a month. We don't speak anymore, but that was a pretty sweet gig. LOL