Crossfit is only a slightly more contentious topic than race, religion and abortion. Despite my insulting title and the fact that I have some major problems with a few of sweaty Scientology's core methodologies, I think on balance it has been and will prove to be a net good for fitness. New religions always have a bumpy beginning, but the ones that succeed jettison cumbersome ideology, self-criticize, purge and adapt. Crossfit is starting to do that right now - perhaps not corporately where it continues to spout a fair amount of nonsense - but at the individual affiliate level where informed and innovative folks are running some of the best gyms/boxes/whatever in the country.