Because parkour and freerunning share many movements, ideas, and philosophies, practitioners generally do both. Rarely will you see someone exclusively focus on one or the other. Once practitioners get immersed in parkour or freerunning, they usually take interest in many other kinds of movement based activities such as breakdancing, martial arts, dance, or gymnastics. Parkour and freerunning will teach you nearly all the same things and provide you with the same benefits. In the end, it is best to not worry about restricting your movement to one specific style or discipline. You can learn from all of them; the most important thing to do is just get out and move!

Well I might be totally wrong, but here goes:

in all my looking online I keep finding the idea that free running, parkour, l'art de movement, urban junggling,... are all basically the same thing (kinda like soccer and football are the same the name just depends on the country ) but even if there are some small differences they all have the same core and the idea that the movement is individual to the person .... that is to say ...   that given the same environment , same start point and same destination 2 people may not take the same path, but that does not mean that one is right and one is wrong, just different.......whatever we call it (parkour, free running, urban jungling,... it is about movement, precision,overcoming the obstacles and finding the path that works for you......that is what matters.

not true man, not true at all. You do heaps of useless things every day just for the sake of having fun. Don't condemn freerunners just because they have guts and enjoy showing people what they can do. Its just another way of enjoying yourself, and pushing your body to the limits.

spot on

as one wise person once said, not too long ago- something along the lines of 'stop talking and go train'. It's all in the training, in how you move and who cares what you call it. I'm never going to care what anyone thinks about what I do ever again, because I enjoy it and I do it for myself.

I disagree completely.  There is no "move list" in parkour.  Yes, we train certain movements because those are useful in many situations.  But you can't predict what obstacles you'll come across in the world, what angle from which you'll have to attack it, what might be on the other side.  True flow is as formless as you feel free running is.  You make things up on the fly.  You adapt what know to the minutiae of your environment.

If you doubt this, take a look at Kazuma and Stephane's flow in this vid.  Yes, I know that they have some flips in there.  They believe, as do I, that parkour and free running are the same thing anyway.  This doesn't mean that the movements they do can't be used to escape or pursue.