It's not initiation. PP was stabbed well after he ran away successfully from Lawrence.
I don't know about the crap human being stance either. I mean, bb guns shootings, dui's, on campus brawls, and beating up gf's aside, these ppl aren't running around being violent and stabbing others, just getting stabbed.
Maybe someone has it in for KU bb'ers and whenever said someone is caught in a 1 on 12 brawl with bricks being thrown at their heads, or when they see PP walking out of a club, they feel like they just HAVE to stab them?