I am okay calling college students 'kids.' I am closer to 60 than 50.
I am also okay with other people not calling them 'kids.' Especially considering that legal age to drink is 21, legal age to shoot and kill someone for the USofA is 17, w/ parental consent.
It is subjective. I view it as relative, as I would not call them a kid against a high schooler or one of my grandchildren, for example.
Legally Brooks is not a kid. Brooks is also done with collegiate wrestling, so I would not call him a kid anymore myself.