If I was Disney security, my attitude would be “you don’t pay me enough to get into that”. If Disney security got involved and laid hands on any of them, there would be lawsuits flying, accusations of racism, and non stop protests by Black Lives Matter and Antifa.
Disney probably has policy forbidding security getting involved in brawls.
“... “you don’t pay me enough to get into that”. ...”
Bingo... not worth the effort.