The seven deadly sins of the 2010s: No, not pride, sloth, etc. The seven UI 'dark patterns' that trick you into buying stuff

Present in more than 1 in 10 top websites (and yes, greed covers them all)

Dark patterns - user interfaces designed to deviously manipulate people into doing things - have become common enough on websites and in apps that almost two dozen providers have sprung up to supply behavior persuasion as a service."