Security Research : Be friend to anyone on Facebook in 24 hours. Brazilian researcher Nelson Novaes created experiment through which he intended to befriend on Facebook a girl who worked with web security. Novaes literally cloned the profile of someone very close to the girl: her manager. In just over two hours, the manager accepted the friendship request made by the profile cloned by Novaes. In the next hour, the researcher devoted himself to request the friendship from direct friends of the manager. In just one hour, 24 of the 432 requests were accepted.
Source: https://thehackernews.com/2011/11/security-research-be-friend-to-anyone.html