March 15, 2012
July 1, 2012: The Day ISPs Start Spying On Customers
Correction: This story originally cited July 12, 2012 as the date ISPs start spying on customers as this was the date widely reported at the time of publishing. There are still conflicting reports but it appears the correct date is July 1, 2012. Regardless of which date is correct, if you use BitTorrent, my suggestion is to play it safe and assume they are starting July 1.