“Dark patterns” are when web designers exploit common browsing behaviors and use them to trick people into do something that’s to their disadvantage. One of these, the “anti-scan trick question,” is used by RyanAir to get people to sign up for travel insurance. Counterintuitively, to opt out you have to scroll through a “please select country of residence” drop-down menu. Sneaky.
ANTI-SCAN TRICK QUESTIONS [DarkPatterns] (Thanks to Josh!)