However if a child is just playing around and causing a disturbance then it is definitely annoying, if the parents don't do anything about it then they are being bad parents, the only reasonable solution after that is duct tape.
Yeah, that doesn't work. I speak from first-hand experience. Parents with small children should be banned from eating out. Either that, or there should be separate restaurants for adults who don't want their dining experience ruined by pint-sized, misbehaved, feral humans.
They do? Where? I'll pay the extra cost, even if it's twice the price of the other place with the brats. Totally worth it! Around here, you can't go to even a Ruths Chris without running into a misbehaving whelp.