Who's not allowing disruptive people in their places? You have people on cell phones talking loud, some places you have drunks, you have guys hanging around hitting on people....
Disruptive people are allowed in businesses all the time.
etc.
Restaraunts and all businesses have the right to refuse service to anyone. If they do it for reasons of gender, race, religion and similar reasons, its illegal.
If it is because someone is being disruptive, its not.
If a business chooses to remove or not remove a disruptive client, that's their business. I know that if they don't,
I may not return.
This guy was trying to keep his restaraunt quiet. His space, as noted, has a tin roof- a perfect surface for reflecting sharp, loud noises. And a screaming child is nobody's idea of a "dining experience" enhancer to start off with.
Personal example:
I just took my mom to a fabric store last weekend and was clipped by a running, screaming butterball of a child- I nearly fell on him when he hit me in the back of the knee... the knee I had surgically repaired just a couple of years ago.
His mom sitting 20 ft away did nothing, said nothing. He continued running about the store (with other children) until closing.
The next time this happens, I may fall on him. If he re-injures my knee, his folks are paying for my medical bills and lost wages (which could be substantial- I'm an attorney...and the drugs I was on while in rehab from surgery made me functionally illiterate for almost a year- I couldn't read anything in normal sized print, like contracts, law books, etc.)
As for the public shaming thing...I have no problem with that.
All of my grandparents and my mother were teachers. My paternal grandfather in particular taught for something like 50 years in the New Orleans area, from grade school to college. He (and each of my other ancestors in question) have all used similar techniques in teaching AND in rearing their own kids.
And you know what? My dad's an MD, I'm a lawyer...and every time I went to New Orleans, I ran into people who told me things like:
"Your Grandfather humiliated the hell out of me when he threw me out of ___________ for ___________...but it got me thinking. It turned my life around!"
These people weren't ditch diggers- they were office managers for law firms, restaraunteurs, legislators and other successful men and women.
Embarrassment, used the right way, can be a powerful motivating tool.