Erasing Registry Entry and Deleting Files Causes DMCA Lawsuit

By way of Slashdot, Wired has reported that a man who distributed a program that deletes registry entries and files is being sued for  violation of the DMCA.  In short, the files and registry entries prevent members of Coupon.com from printing multiple coupons that are tied to the user's id through the software installed by Coupons.com.  

With this in mind, it is conceptually illegal under the DMCA to take a snapshot in a VMWARE virtualization and revert the snapshot, or even make the process of restoring from a backup illegal if said process bypassed any protections incorporated by intellectual property installed on that system.