I loved this site, no matter how stupid it was. At one point I was obsessed with getting the best answer for every question I could answer. I feel Quora has a blog-like feel rather than proper Q&A site like YA.

The Winklevoss twins openly stated that their twitter account was hacked inspite of having a strong password and 2 factor authentication system. I think this is an internal hack, not an external hack, more due to the fact that all those big accounts were cracked pretty easily without any notification to their owners.