I'm fine with it so long as they ask. I have a friend who was living with a friend.. they ended up kicking him out, keeping his stuff, and selling everything at a garage sale without telling him. He tried coming over to pick his stuff up, but they refused, and then sold it, and now claim he never tried contacting them to pick it up (as their reasoning for selling it). So he doesn't have a computer and I let him use mine because I understand how it is to not have one (I went without one for years when my parents' broke. Until I built my own, that is ).

But what DOES bother me is when they download and install all kinds of programs.... this same friend, I love him to death, but he installed AOL on my computer!!!!! I HATE that program! Its a leech, even if you uninstall it, it doesn't go away because it roots itself in your computer and is near impossible to get rid of. If they ask, its not a big deal... but.. AOL ugh.
Not only that but he installed everything to my C drive and my C drive is JUST for my operating system.. everything else is on my D drive (which is also a much larger drive) so just.. grar.

I suppose my mild OCD doesn't have anything to do with it, either lol