Not content with contaminating your mailbox or using your windshield wiper as coupon clip, Domino’s has found a new hi-tech method of distributing coupons using the concept of inertial mass combined with a transparent weatherproof barrier. Ok, it’s actually just a Ziploc filled with coupons and rocks. Reader Will arrived home to discover the baggies littering his driveway and those of his neighbors’. We assume that the rocks allow the lazy Domino’s employees to easily fling the bundles out of their car windows and help keep the baggie weighted down. Will’s letter, inside…