yeah... barricades you can step out of your car and move aside. our PD never even enforces the park closures, unless whomever they encounter is drinking or hitting the whacky tobacky.
a funny anectdote, some years back, okay, a lot of years back (9?, 8?) my cousin and i pulled into a park to pour a couple of screwdrivers (yes, we were really really stupid back then) when a PD cruiser lights us up. my cousin panics, tells me to hide the bottle of vodka, so i toss it into the back seat. now the back seat is full of clothes, cds, food, garbage, paperwork, skis, the works. so the bottle is now lying on top of everything. the officer tells us the park is closed, and we should move on. doesnt check ids, registration, insurance, nothing. he then asks "is that an open container of alcohol in the back seat?" jason meekly answers "yes". he says "well you should put it in the trunk. you cant have an open container in the car with you like that, you'll get in trouble for that. good night."
we still marvel at not getting nailed for underage possesion of alcohol, underage consumption, and whatever else laws we were violating. we wound up heading home and drinking the booze there.