I do not think everybody knows.

In 20 years of trips, it is amazing what people do not know about the processes and what they accuse others of doing.
To the defense of the OP, many people say things under their breath or what they feel is earshot out of others. It is not unheard of that some self-entitled person on a VIP tour think his family is truly VIP and get mad because he wanted to be prioritized. Also, My MIL would not use the explicitive, but that is the exact mentality she has.
I will also add that there are people with disabilities who feel they should be prioritized over everybody else. I know some of those people, always playing the victim card. I have limitations myself, but I wait my turn. Not everybody thinks the same.