The information doesn't identify you personally. It just shows interrelationships among web sites. However, it is a bit disturbing that all of someone's AdSense sites can be displayed together.
Originally Posted by Zash
It doesn't appear to be a privacy issue when the information obtained is from public sources. Even without this tool, anyone can find the information if they are willing to spend some time investigating. The tool just makes it easier to gather and correlate the information that you have no ability to protect.
"Democracy is two wolves and a lamb voting on what to have for lunch. Liberty is a well-armed lamb contesting the vote." -- Benjamin Franklin