Facebook researchers found 1 in 8 users - about 360 million people - are addicted to the app damaging their work, relationships and sleep...

 https://www.dailymail.co.uk/news/article-10173395/Facebook-researchers-1-8-users-addicted-app-damaging-work-relationships-sleep.html

Too much of anything can become a problem.

http://www.techaddiction.ca/why-is-facebook-addictive.html

https://thedigitallabyrinth.blogspot.com/search?q=Facebook