I agree that parents need to be responsible for their kids. Seems like a no brainer, but I see parents not watching out for their kids all the time in public places. BTW, I have kids (4 of them) and know how tough it is. We watch over our 4yo like a hawk and have hopefully taught our older kids (10, 13, and 16yo) some survival skills. I'll have to admit, though, that we still really need to keep an eye on our 13yo because he would be the type of kid to step off the ride too early. Of course we know this and are watchful. My 10yo pays much better attention than his older brother...
T&B