My dad actually supports my paintball habits. He prefers me spending money on new gear and guns over getting more tattoos. Although he has been getting on my case for spending too much money on gear lately.
My mother actually wants to give it a try one of these days after her ankle is better. I just gotta get a 2nd hopper and I'm planning to take her out one Saturday for some woodsball.
I think most parents are supportive once they see its actually real safe and especially if they aren't the ones paying the tab. I know when I was younger it wasn't the same support due to them paying the bill, or the travel expenses etc.