How is this even a question posted?
There is only one answer:
no, the child SHOULD NOT HAVE BEEN ALLOWED TO SIT AT YOUR TABLE OR CLIMB ON THE CHAIRS! WERE THE PARENTS ON CRACK? WHY WAS "SHOULD WE GET HIM?" FROM THE FATHER EVEN A QUESTION...YES, DUMBO, YOU SHOULD GET HIM!
The poor OP didn't want to be rude, I am sure, or risk being told off by the parents, I totally understand OP's lack of saying anything, but that is a sad state on parenting that they felt they couldn't say anything.
What the hell era were these adults raised in who let their kids climb and jump all over restaurants, run all over stores, disrespect people and their time and belongings? I am 38, I was raised in the 1970's and a teenager in the 80's, I am as liberal as all get-out and a parent of two children. What happened to manners? Plus why do people use the "you must not like children" excuse to anyone who expects parents to PARENT their children and teach them how to act in public?
I have 2 friends with autistic children who are FINE in restaurants, but the parents eat at counter-service places because they can make a hasty exit if they have to. Yes, my friends yee gads, SACRIFICE eating at table service places because their children might get out of control due to their autism. yes, it sucks that they don't get to experience Le Cellier, etc but my 4 friends are too respectful of other diners to intrude on their experiences, but they want their sons to experience WDW.
I think it all comes down to the fact that so many people are self-absorbed and concieted these days, they think they are better than everyone else. WHY SHOULD I CONTROL MY CHILD, I PAID JUST AS MUCH TO BE HERE AS YOU mentality. Screw you if I am ruining your dinner.
Whatever...when it comes to kids, nobody on this or any board will ever agree!