Dude I keep seeing this in my gym too. People think they are Bane or something. I guess it's to measure oxygen intake, but it's like #1 you're not an athlete and #2 I bet you don't even know how to breath properly anyways.
I lowbar squat but train highbar just as much. I would say that neither of them make you more injury prone, seems like olympic lifters have knee and hip problems while powerlifters have back and hamstring problems.