The document lists 6 reasons for not using Facebook: 1) It's dangerous because people can see everything you do and share too much personal information. 2) It's a big waste of time and can be addicting. 3) The author's kids are on it and it's not serious. 4) It's not useful and may disappear like other platforms. 5) Social networks don't last and something else will replace Facebook. 6) The author doesn't understand how Facebook works with changing rules and friend requests.