It is really more like having one cashier at a grocery store refuse to ring you up as opposed to the grocery store chain not allowing you inside because the cashiers decided you weren't delightful enough, even if that was because your child was loud a few times.
When it is the cashier, you have a bit of recourse, after all. When it is the chain, you have very little recourse and not only that, but now you have to figure out where else to shop. It might not be so bad in a town with many grocery stores, but it'll be mighty inconvenient if you have to drive to the next town to shop.
I'm generally not a big fan of database driven black lists.
They have all the problems of bad decisions individuals make with much more impact and much less recourse.
It's like the difference between an injury and a chronic disease.