I have to ask, do you really see this as hazing?
Did your kids never have a snowball fight?
Do I think they may need to tone it back? Yes, but I don't see it as hazing.
Sorry, but IMPO if this is too much and you want to fly, especially fighters, I suggest you don't partake in the tradition because IMPO the instructors will eat you alive as their daily snack during UPT, FTU and as the FNG for your 1st operational tour.
Do the math. For every 100 UPT students, 70 will wing, and 5-10% will get fighters...basically @5 out of the original 100 pool.
This is a way to grow a thick skin.
Comparing this event to UPT and FTU makes no sense, completely non related. Lets be honest you need to be mentally and physically ready for UPT and FTU as compared to a snowball fight that has fallen into a brawl that requires no mental or physical challenges.