Not sure they still do this, but when I deleted my Facebook account (some years ago) there were numerous dark patterns designed to get me to relent, including a

Not sure they still do this, but when I deleted my Facebook account (some years ago) there were numerous dark patterns designed to get me to relent, including at one point showing me pictures of some of my friends and saying "Are you sure you want to do this? <person's name> will miss you" etc. It was incredibly manipulative.