https://www.theguardian.com/technology/2018/jul/15/instagram-question-answer-new-feature-mistakes

People thought they could make unkind comments with recourse before discovering users could see who was asking what

Instagram’s constant kamikaze launch of new features, in which they desperately try to hold on to their sizeable but fickle user-base by throwing new story modes and face filters at them, installed an interesting new question and answer function this week.