[1] Social media sites are regarded as threats to Australia’s secret protection program for witnesses.
[2] Aside from the social media sites’ image tagging capabilities, new facial recognition software and biometrics are also exposing witnesses’ lives at risk.
[3] It would be difficult to hide witnesses living under new identities because there’s greater chances that the participants or family members are already actively engaging in social media.
[Source] Australian Information Technology News – Social media may be killing witness protection