You can still sign up for Quora accounts without a social network OAuth. I just did. It asked for my email, firstname, and lastname.
When you post questions or answer, you can also click the "anonymous" checkbox to remove your name.
When you post questions or answer, you can also click the "anonymous" checkbox to remove your name.
if you don't, they'll flag you and until you update your name, your account will be frozen (you can read and follow but can't answer) and all your previous answers hidden