Blimey! The cup runneth over!!
What I'm getting is that it's not so much the kids, but the rubbish parents? Bearing in mind that these people are an integral part of your daily working life, isn't this a MASSIVE drawback to your work?
Not trolling, but I wonder why something that draws such strong reactions would be worth carrying on with - if it were me, I'd be off to do something that made me happy or at the very least didn't piss me off so badly?