Just found this:

http://www.quora.com/Quora-Question-Policies-and-Guidelines/...

"Poll questions ask individuals for their opinions, preferences, habits, or other data without also asking those individuals how or why.Here are some examples:

    Did you vote for McCain or Obama?
    What is your favorite color?
    What type of laptop do you own?
    What is your favorite bar in San Francisco?
    How many friends do you have on Facebook?
    How often do you brush your teeth?"

They say that these type of questions are not allowed!