"According to this article printed in tagesspiegel.de, not having a Facebook account could be the first sign that you are a mass murderer.(German) As examples they use Norwegian shooter Anders Breivik, who used MySpace instead of Facebook and the newer Aurora shooter who used adultfriendfinder instead of Facebook. They already consider those with Facebook accounts, who lack friends to be suspicious, but now they are suggesting that anyone who abstains from Facebook altogether may be even more suspicious."
česky: masoví vrazi nepoužívají Facebook :-)