Anonymous can seemingly attack any website at will, and deface the content, and steal data. Why was Bart attacked? In response to Bart blocking cell phone access last week to prevent a protest at one of their stations. So this hack is an extension of free speech or simple theft and vandalism? Either way, just another example of how easy Web applications are to damage and exploit because they are not protected by any type of security.
Also an interesting quote from anonymous in this article from the SFGate.
BART “stored their members’ information with virtually no security,” the hackers wrote. “Any 8-year-old with an Internet connection could have done what we did to find it. On top of that, none of the info, including the passwords, was encrypted.”