If you believe the environment is the source of all evil you have to control everything.

Gun play: 'Zero tolerance' toward schoolkids could backfire, says expert | Fox News: Because we proceed from the assumption that people are naturally good we form the idea that to get rid of aggression all that is necessary is to avoid exposing children to the idea. People who reason this way are forced to go to ever greater measures to stamp out anything remotely likely to encourage violence. Failure is met with greater exertions and more fanatical restrictions.