Websites know you're using ad-blockers, and they're coming for you

The Washington Post is stepping up its defenses by actively striking back at ad blockers. The newspaper is testing out a feature that stops readers with ad blockers enabled from viewing an article until they agree to sign up for an email newsletter or subscribe.
http://mashable.com/2015/09/12/passive-agressive-ad-blockers/#hr_W0jmzFSkW