The park is no more dangerous at 30 than it is at any other age. It's dangerous if you ride outside your capability. As is any place on the mountain.
I didn't set foot onto a snowboard (or ski for that matter) until 36. That was last year. As you've heard from others already, not even that's old. So get out there and enjoy yourself. Ride what you want to ride. Let your standard and progression be your guide, not your preconception
