Netflix is already losing masses of customers over its password-sharing ban. Here's how it's clamping down around the world.

• Netflix is pushing ahead with its password-sharing clampdown.
• The streaming giant has said its US crackdown will start in the current quarter. 
• In Spain, users have gone on a canceling spree. Here's how the clampdown works.

Netflix is pushing ahead with its password-sharing clampdown — and research shows that scores of customers have gone on a canceling spree.