Frequency Capping

Hi All,

In case you haven't seen it already, I recommend Prof. Felten's 
excellent blog on "Privacy by Design: Frequency Capping." Please also 
read Brian O'Kelley's post in the comment section explaining what he 
sees as the technical hurdles for these alternative frequency capping 
methods. (I may be wrong, but I think Brian is a former student of Prof. 
Felten.) This kind of detailed technical discussion of these proposals 
seems very helpful. First, it helps us set reasonable expectations on 
all sides. Second, and more interesting to me, is that maybe we can have 
more discussion and collaboration on bringing these sorts of things to 
production.

http://techatftc.wordpress.com/2012/07/03/privacy-by-design-frequency-capping/

-David