Making it hard to get into the park doesn't work either. Ski patrol just needs to patrol the park and call out people not following smart style. Its not hard it just needs to be implemented.
I have ridden two parks that were controlled very well. Mt Snow and Snowmass, both at least 3 or 4 years ago. But basically, they had an employee sit at the entrance to the park and stop every one on the way in. He would let groups of 8-10 people go in at a time. No stopping and waiting with 10 buddies. No hiking. You just dropped and rode through the park. Once one group of 10 got 1/2 way through the next group dropped. It worked great. It didn't matter if you were a beginner of a pro, you could ride through with out getting snaked 30 times.