I've been injured playing footy, broke my ankle going for a run once, tore my groin playing touch, got horrible shoulder r.o.m. from lifting heavy and probably overdoing chest workouts, never been injured doing Crossfit or Crossfit style strength and conditioning/Olympic lifting in 3 years. Haters be haters. I'm fitter than ever, stronger than ever, have greater mobility, better cardio, etc. Serious injury, sure. There are dodgy coaches out there but there are just as many serious injuries in conventional gyms/weightlifting/bodybuilding, other sports and recreational activities. I don't get the hate, but then again I don't care either.