The idea exists in an apple patent here: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=8,205,265.PN.&OS=PN/8,205,265&RS=PN/8,205,265

And summarized here: http://www.cultofmac.com/175422/apple-patents-lying-to-those-who-are-spying/

I roughly propose an open source application that can run when you are not using the computer, similar to the SETI program.

It may take a dictionary that randomises all user activity to a point that it is undetectable from real activity.

Search terms and habits may be shared randomly among users, and it would not only solve the NSA issue but also the big corporate issue too.

I would use a dictionary without the keywords relating to kiddy porn and terrorism. I imagine that this would work like a democracy that would leave users exposed that are on the outside of what society deems acceptable.

Please provide some feedback.