Shame on you if you share your password. The consequences can ruin your sterling reputation, violate legal terms of service, promote fraud and identity theft, and give ex-lovers weapons of mass digital destruction. We all do it, despite the risks. Share your Netflix password with your BFF so she can watch House Of Cards and season 4 of Arrested Development. Reveal your Amazon password to your teenage son so he can rent college textbooks using your account. The list of examples goes on.