Capital One filed a lawsuit Tuesday against operators of alleged "scam campaigns," accusing them of something unexpected: trademark infringement. The suit, filed in the U.S. District Court for the Eastern District of Virginia, lists 10 "persons and/or entities of unknown identity" as defendants. Those John Does operate large-scale robocall and telemarketing campaigns that misuse trademarks for Capital One or its subsidiary Discover, according to the lawsuit. The complaint alleges that the