Why you should be blocking large, centralized, webservices ….

1) They already know too many things about you where you don’t understand all the uses.
2) 1-stop shopping for anyone who wants to know more … legal or illegal uses
3) Anything stored will eventually “get out”.
4) By using G-A, you’ve decided that your visitors will provide data to google without asking them for permission. That is like inviting someone into your home and taking movies of anywhere they go inside your home, including the toilet, then giving the videos to the largest advertiser in the world.
5) You must agree to Google’s terms, which basically saids they can do anything with the data they like, forever.

Google may not be obviously evil today, but just the fact that they retain data about so many people makes them a danger to us all. All the large centralized services have that same issue.