Chill, nobody said the people who do Parkour are criminals, just said it looked like they were practicing running from the cops. Shoot, even I who tend to be a bit on the cynical side didn't make the jump to them actually BEING criminals. I'm not even knocking the practice, darn, I wish I could move like that myself!!!! I think it is amazing myself. The first time I saw a short clip about it, I had to play it several times to see how they pulled off such realistic special effects, then realised they were actually making those jumps and landings. I made the infrence that it isn't "modern Ninjutsu" at all, and it ISN'T; that I will stand behind 100 %. What it is, is something new, why should somebody slap a label on it that isn't right. I would think the people who practice it should also be royally ticked-off about calling it that. It is unique and stands on its own merits, to label it something it is not is an injustice to those who started it.
My .02, take it for what it is - my opinion.