No there wouldn't.
Say a stupid college kid decides to try and jump off the boat and grab the keys on POTC. There are rules posted everywhere. Constant reminders from the CMs.
Undercover security on the ride. Armed guards in the queue. Whatever. That kid is still going to try and get away with it. It's a dare. Or it's stupidity. Or it's bravado.
So, he tries to jump the boat and makes it to the jail scene. The ride stops, lights go on, alarms sound, CMs appear. The kid is arrested for trespassing. He has to pay a large fine. It gets written up in the paper and online -- people are posting about how this kid got hauled off the ride and arrested for leaving the boat.
Do you really think that that's going to stop anyone else from trying to do the very same thing? Of course it won't. Because someone else out there who is just as dumb as the first kid is going to read that and think, "That's BS! I'll bet I could jump that boat and get those keys and not get caught!" and the cycle begins again.
It's nice to think that "if Disney cracked down, this would stop" or "if we all stopped excusing this behavior, it would stop", but it's not true. Because, unfortunately, there's always going to be one more person who thinks they can do something dumber than the last guy.