Want to know who's spying on you online? There's an app for that

I have used 'Little Snitch' for years, in order to block this sort of thing. It's pretty keen software that prevents your computer from sending out information without your consent. It's amazing how many times your computer is queried for information. It also keeps your applications from 'talking' to the developing companies servers - unless you agree to it. (Adobe is a good example.)

http://www.obdev.at/products/littlesnitch/index.html