text: In June 2010, a group of computer experts known as Goatse Security exposed a flaw in AT&T security which allowed the e-mail addresses of iPad users to be revealed. The group revealed the security flaw to the media soon after notifying AT&T. Since then, the FBI opened an investigation into the incident and raided the house of weev, the new group's most prominent member.
  In April 2011, a group of experts discovered that the Apple iPhone and 3G iPads were "logging where the user visits". Apple released a statement saying that the iPad and iPhone were only logging the towers that the phone could access. There have been numerous articles on the matter and it has been viewed as a minor security issue. This instance would be classified as "grey hat" because although the experts could have used this for malicious intent, the issue was nonetheless reported.
  In August 2013, Khalil Shreateh, an unemployed computer security researcher, hacked the Facebook page of Mark Zuckerberg in order to force action to correct a bug he discovered which allowed him to post to any user's page without their consent. He had tried repeatedly to inform Facebook of this bug only to be told by Facebook that the issue was not a bug. After this incident, Facebook corrected this vulnerability which could have been a powerful weapon in the hands of professional spammers. Shreateh was not compensated by Facebook's White Hat program as he violated their policies, thus making this a grey hat incident.