Maybe charge a deposit? Not trying to blame the victim, just really curious about how to build a business that can't be DOS'd by competitors. Often wondered h

Maybe charge a deposit? Not trying to blame the victim, just really curious about how to build a business that can't be DOS'd by competitors. Often wondered how a Netflix or Redbox prevents competitors (once Blockbuster now Amazon?) from renting a bunch of DVDs only to return them with scratches. Maybe track problem accounts then ban them is best you can do?