This is why most dog parks in the MD/VA/DC area do not allow kids under 16 in the dog park PERIOD.

It is WAY to much of a hazard if you ask me!

Any time I see something, that just should not be, at a dog park, I do something about it.
Aggressive dog gone, roudy kid gone, unattentive owner gone, owner doesn't scoop the poop, I hand them a baggie and give em a BIG smile.

The key, is to make friends with lots of people at your local parks, and gang up on any new comers whom decide to not abide by the rules. Works very well! Angry mob and all.

I have seen mothers who just want to let their pup out to play at a park, and it's fine when they are the only one there and have a small child in a stroller with them, but as soon as more people start to come in, as long as the mom has enough common sense to pack up and leave, I'm cool with that.