It’s unknown if the US IRS has anything like this but more than a few companies like the idea of combing the interwebs looking to see if you’re reporting your income.
Websites around the world are getting a new computerized visitor among the Googlebots and Yahoo web spiders: The taxman. A five-nation tax enforcement cartel has been quietly cracking down on suspected internet tax cheats, using a sophisticated web crawling program to monitor transactions on auction sites, and track operators of online shops, poker and porn sites.