Is being told, on TV show or otherwise, by kids, "mind your own business" really that insulting to adults?

As after Stanley pees himself and that man asks "Excuse me, is there a problem" and that other kid says "Mind your own business", the adult contestants react angrily and with deep outrage like that and in dead seriousness too?

Granted it's not nice I agree and is strange at times too. But still...

Come to think of it. Probably yes.

(Not that their at first suspicions and later reactions of anger helped Stanley at all and the situation for him and them. Oh and then after being announced by adults that they (adults) have won, the other kid reacts with even MORE anger and hysteria, using f words and whatnot and telling him in an angry argument style that they did not really win etc.)

P.S. Why does wetting himself caused Stanley to wet his mind with it, and basically fail terribly as a result on that whole game show? With his two friends upset and humiliated also as a result?