I personally agree - I would be annoyed if I discovered this (I haven't logged on to Quora in a long long time). They seem to have most recently updated their Privacy Policy (http://www.quora.com/about/privacy/) on August 1. Quoting "Specifically, you consent to Quora's disclosure of information related to the ways in which you interact with the Service, such as: landing pages, pages viewed".
On the counter-side, I would have been okay if they sent a mass-mailer saying "We have introduced a new feature on Quora - now you know how your peers are doing with Quora!" - making it sound marketing-like, but in reality, percolating the information to their users in the most seemingly-harmless way possible. This could have won them actual fans for this feature.
On the counter-side, I would have been okay if they sent a mass-mailer saying "We have introduced a new feature on Quora - now you know how your peers are doing with Quora!" - making it sound marketing-like, but in reality, percolating the information to their users in the most seemingly-harmless way possible. This could have won them actual fans for this feature.