RockYou! in 2009
RockYou!200932,000,000WebGamingHacked4. Email passworda and/or health recordshttp://techcrunch.com/2009/12/14/rockyou-hack-security-myspace-facebook-passwords/Tech CrunchThe site did not allow users to use special characters or punctuation in their passwords and e-mailed user passwords in plain text. Hackers took advantage of these security lapses, using simple techniques to gain access to 32 million user accounts.