This must be from the EU's new cookie directive. From the Register:
In that section was a link to the Network Advertising Initiative.
I went there and clicked on that big red button on the right.
That button took me here.
While I had all either "No Cookie" or null entries a friend had a lot of sites with "Active Cookie: You have not opted out and you have an active cookie from this network."
So you know what I did. Clicked on "Select All" and then "Submit."
Hmmm. Why didn't it take?
I tripped myself up. In Chrome I had third party cookies blocked. It seems that the opt-out cookies are technically third party cookies.
So I went to Chrome's Settings. In Settings I clicked on "Show advanced settings..." Next I went to Privacy / Content Settings.
I unchecked "Block third-party cookies and site data" and clicked "OK" way down at the bottom.
Then I tried the "Select All" and then "Submit."
Much better. A couple of them still didn't take but I made real progress. Then I re-checked "Block third-party cookies and site data" in Chrome's settings.
On this page the NAI says:
The NAI has adopted a policy that all NAI member companies set a minimum lifespan of five years for their opt out cookies.So I should be done for a while.
For the truly paranoid, go run this test.