Is there some sort of problem with English comprehension here? 1. we are not talking about table service restaurants (I kinda said that twice already). 2. YES, virtually everyone with a family does this in McD's (billions and billions served, and all that), BK, Wendy's, Taco Bell (do I really need to go on?). 3. it's not a problem even at WDW when the crowds are low (hence, not a rule then).
Virtually everyone in their normal, everyday life, when they go into a
counter service restaurant with any sort of group does this. Yes, they actually do, I'm sorry that you live in a land of make believe, but fortunately for the rest of us, the really real world actually exists, and judgemental, myopic people like you are generally the ones that aggravate us when we are trying to enjoy our vacation.
Have a dole whip and a smile and ........