Glenn Steven Mangham, 26, sentenced to eight months in prison for hacking into Facebook. Facebook spent $200,000 (..126,400) dealing with the crime, which triggered a “concerted, time-consuming and costly investigation” No user details were taken, as he went straight for “invaluable” intellectual property. Facebook operates a bug bounty program in which it pays ethical hackers up to $US 500 for quietly disclosing vulnerabilities. The software development student claimed to have been an ethical hacker who had previously breached Yahoo’s system.
Source: https://thehackernews.com/2012/02/facebook-hacking-student-jailed-for.html

