Seriously, muzzle and leash them if you have to, 'cause they're pissing me off.
Today, we had a child who apparently wanted dessert. I know this not because I am a mind reader (seriously, I'm not, so when your order is wrong because you didn't tell me you hate tomatoes you can suck one), but because his parents let him scream "I WANT MY DESSERT I WANT MY DESSERT" the entirety of the meal. If I were his parents, I would have been forced to say, "If you can't shut the hell up and ask nicely, you're not getting anything." And if he did not shut the hell up, his happy ass would be on the car, on the way home, sans dessert.
Another little snot-nose punk I have a history with. I will preface this by saying a few people call me "blondie" at work. I will respond to it if it is used as an affectionate nickname, I will not of their eyes are telling me they mean it as "dumb blonde" or "I do not care to learn your name, simple server, now bring me my french fries." And I've been a blonde all my life, I know the difference.
Now this kid's white-trash dad? uncle? inbred cousin? took to calling me 'blondie' in the latter form. I told him semi-politely (but with an undertone of "I will follow you home and put sugar in your gas tank, you wang banger"), what my real name was. But the little brat will still holler "HEY, BLONDIE!" across the restaurant at me when he needs something. AKA, every thirty seconds. His family giggles like it's freaking adorable and lets him be a self-entitled asshole. That, among other reasons, is why they are one of only two or three tables I refuse to wait on.
Seriously, parents. I'm all for bringing your kid out and socializing him/her or whatever, but if they act up, they won't learn if you don't correct them.