I would expect five year olds to boo. I wouldn't support it, but I wouldn't be surprised given the age.
I don't expect adults to boo, especially at an event where RBG lies in state.
Sunny: "I'm all about decorum."
Yes, Sunny, lemme show you a video of you spinning in your chair loudly say "Woooooow...Wooooow....Woooooow" last week.