It's supposed to be the season of peace and goodwill, but scammers are everywhere. Identity thieves, computer hackers and fraudsters tend to increase their efforts over the holidays because more consumers are online purchasing gifts and looking for deals, says Dave Aitel, the CEO of Immunity, a software company that creates penetration-testing products (i.e., hacking tools). Scammers also take advantage of people's generosity during the season of giving.