S.W.
I know what you mean, I hate when parents don't control their unruly kids. I have a two year old who gets scared easily, if kids are being disruptive, so when that happens to me, I either move to another area, or, if their behaviour is directed at my son, I'll tell them to cut it out. If a parent has a problem with that, I don't care. I think adults have a responsibility to help kids learn about what good behaviour is. Usually, parents don't even notice, or if they do, they probably appreciate it. I'm never mean to the kids, just tell them to stop it, or whatever.