I have shared meals with Paul many times in the past couple of years. I will testify that I have never seen him throw food, spill cracker-crumbs, or beat his companions with BBQ bones.
I have seen him use the Boarding House Reach a few times (at Hays Smokehouse where that is an accepted practice). I have also seen him spill a little beer trying to keep up with us younger guys (Tiki/Poverty Pete & Myself) as we drifted with the current on Beale Street in Memphis.
I think I would be comfortable sitting at a family table with him at almost any restaurant. Now as for my 20 grandkids....Perhaps some McDonalds gift coupons (mailed to them) would be a good solution!
To be serious for a moment. It is hard to blame the child if the parents either ignore or refuse to take any action to control the behavior of the child both before they ever show up in a restaurant, or while they are there. I have seen many examples of children who can make good choices and can behave with some patience and discipline during a meal 'out'. But those are not automatic behaviors, They are learned and developed with practice and by the example of the Parents.
It may offend the lazy parent for a server to suggest that the parent try to control an unrulely child to prevent a situation from getting worse. You may lose that customer, but if you don't establish some level of "order" you will lose the customers who have their meals disrupted.
Not a fun experience for an Owner/Manager, but important to the success of the operation.