This might not be so good for ad agencies, but this is some good news for consumers. It appears that Internet Explorer 10 will have do not track enabled by default if you choose the default/recommended settings option when you first use Windows 8. If you choose custom, you'll have to set all of your Windows settings by yourself.
When IE10 comes to Windows 7, there will be a message when installing the update asking about it, and there will be a link for more information.
While there are some possible ways for ad agencies to get away with it, they would most likely get caught. Take the incident in February about Google ignoring Safari's Do Not Track setting.
If you have any thoughts, let me know of them below.