Your things are your own, and while it can be nice to share, you need to respect other people's stuff and not take things without asking. This is essentially the first lesson that we're ever taught in school, and yet, a frightful amount of people can't seem to get that one right. We're not saying that you should go around teaching people lessons; It's just not a good idea, you might actually be the one in the wrong, and there's far too much chance of you getting the facts wrong, but it's mighty…