one of my pet peeves is the little kid that will stand up in the booth and turn around and watch total strangers eat at the booth behind them
Well, being in restaurant management for 16 years, I've pretty much seen it all. From kids running around and screaming like little banshees to a mother moving things out of the way so she can change a diaper right there on the tabletop.
But kids standing up and turning around to watch someone else eat, that's just kids being kids, being curious. I've seen people react very badly to that. One lady actually flipped a forkload of lasagna at a kid for that, THWOP nailed him right between the eyes. And I've seen others engage the kids and have fun with it. Kids doing that is actually a very common thing. It bothers some, clearly, and if it does the parents should be notified.
But on more than one occasion I had customers come up to me, rather than the parents, and say some kid is staring at them while they're trying to eat. My response was generally the same: One of the benefits of eating in public is that other people get to watch you eat.
But one thing about kids, and trolls, if you let them get to you, they will. Ignore them and they get bored quickly.