Umm, truthfully, I'd probably charge people I didn't know... unless they had a really good cause, then my rates would be flexible... but I'd charge a heck of a lot to people I didn't like, and really, unless I have massive amounts of time on my hands... I'd probably have to charge a little something because I'd have to go with them, and my time doesn't come cheap.... because you can't just let random people walk around in another dimention/time unwatched.... with great power comes great responsibility....