To the OP, read this case, might give you a reason to keep your child nearby.

http://en.wikipedia.org/wiki/Murder_of_James_Bulger

The kid in that case may have only been 2 and the boys 10, but ramp that up 7 or 8 years...

Seriously, what is wrong with people these days? Do we really need to have signs telling us what to do, what not to do? What happened to common sense?