Our local mountain's park is regulated... you gotta buy a pass ($10 for the season), helmets mandatory and you gotta watch some safety video (or atleast some of the video.
It does help to keep the 5yr olds out, but there are still a lot of people w/o common courtesy in there.
The problem I have with that park tho, is that there's not really much room for progression of jumps... 90% of the guys in there can get 5' verticals off the lip in the half pipe... the only other people that are n00bs like me are little kids!!!...haha. All the jumps have at least 15' landings too, which is fine cuz I can do that, but only straight airs

... no where to learn... they have smaller rails/boxes, but i suck at rails, and dont have a desire to learn any more...