What does 'Notion of privacy' means?

[akmal96]

The motion for the upcoming debate comp is 'Facebook is changing our notions of privacy' and i don't really understand

[granny]

Facebook is changing our ideas, or our opinions about what privacy means to us.

To me, my name, email address, ANY identifiable information to ME is private.
Facebook is going to SELL our information for marketing purposes, I am getting ready to close my account. To me, that is unacceptable, they will profit, I believe $32.00 for every person in Facebook, and there are millions of us.

So, our notions, our ideas of what we think is private is out the window.