Woah there!
Are you genuinely suggesting that not stabbing your housemate because he listens to Green Day will result in having to do time in a metal institution in later life because of the bottled up anger?

I would suggest that the stabbity-stab-stab route will get you locked up much faster.
( TFD is sporting this season's finest necropants, Wed 20 May 2009, 22:54, archived)