The young man died as a result of his actions. He made an awful lot of stupid choices. No one forced him to join a frat, no one forced him to join Beta, no one forced him to drink underage, no one forced him to participate in hazing rituals, and no one forced him to drink to that level of excess. Tim Piazza had the opportunity to take many left turns during this ordeal and CHOSE not to do so. If he never fell, he'd be perpetuating the very same disgusting hazing activities.
That said, he didn't deserve to die and the actions of others that night are questionable at best, criminal at worst. That's for a judge & jury to decide--not me.
Let's call it like it is: Piazza made a ton of idiotic choices, and the frat bros made idiotic choices. The result of said terrible choices, on both sides, is tragic.