I don't think its quite like it used to be for fights but I no Varndean battered Stringer in a snowball fight a couple of years ago
Go back about 30 years & I'll think you'll find that varndean won ALL of the snowball fights! God, am I really that old
I remember one snowball fight between Hove Grammar and Nevill.
A grammar RE teacher intervened by walking between the 2 ranks and shouting "Stop! In the name of God". He got pelted rotten.