The park pass class provides an opportunity for people. Like any educational setting, you have to want to learn and then implement that knowledge for it be of any use. If people don't care, they ignore the opportunity.
I can guarantee you that park crew has more important things to do than chasing gapers off the landings and pulling passes. Like I've said before, it's a community: you get out of it what you put in. Follow Thomas' lead and talk to people when they're causing a problem. Calmly and politely explain why what they're doing is wrong, yell if it happens again, then get ahold of crew.