Have you ever clicked on a random friend on your Facebook profile that you didn’t recognize, only to have it be an impostor that gets deleted minutes later? It happened to me once and I thought I was having an episode but here’s a column from the Huffington Post that could help explain what really happened:
http://www.huffingtonpost.com/janet-tavakoli/mark-zuckerbergs-facebook-imposter_b_899495.html