This is true. I think Gene has a big list of thugs, weirdos, pedophiles, robbers, etc.
All connected to various martial arts.
And we are talking UFC 4 here. So, hardly what I would call MMA except for teh fact that they took a karate guy and threw him in the ring with a boxer, BAM! Mixed martial arts.
The early UFC's actually showed just how wide the variety fo martial arst reallyw as and it also exemplified why guys with big mouths should just STFU when it came to putting up. lol (Remembers Fred Ettish)
However, there have been a couple of murderers, 3 or so rapists pointed out in the mma world recently and a lot of spousal abuse too and some suicides. I don't think there is pursuit of spiritual maturity associated with mma practice.