You might become paranoid if you use facebook a lot and google "centra"
Then read this and make up your own mind
WATCH: Sen. Hawley Claims Facebook Program Called 'Sentra' is Tracking Users Across the Web
Sen. Josh Hawley (R-MO) confronted Facebook CEO Mark Zuckerberg over a tracking program known as "Centra" allegedly revealed by a company whistleblower.
www.mediaite.com