Is CrossFit Dangerous?

i'm curious. why don't people pick up a sport? badminton, table tennis, soccer, basketball, whatever... why keep reinventing the gym when its plain not fun?

Full disclosure: I've been active playing sports my whole life. Hockey, soccer, and mountain biking. I've done intense cross training (swimming and hiking) and done a few triathlons along the way.

For me, Cross Fit is simply another exercise fad that's come along. In the 70's and 80's it was Aerobics. Then in the 90's and early 2000's it was Pilates and Yoga. Now, it's Cross Fit. There's so many ways to achieve what they do, I simply can't understand why people would submit themselves to such dangerous activity just to increase their VO2 max, gain some muscle and lose some fat.