It looks like John Chen’s feisty BlackBerry has made itself another enemy. Last week, BlackBerry put up a post on its official blog that trashed the Blackphone for only offering “consumer-grade” security that couldn’t come close to touching BlackBerry’s enterprise-grade security. Blackphone isn’t taking this insult lying down, however, because it’s just shot back and said that, unlike BlackBerry, it makes secure smartphones that people actually want to buy. In its post, Blackphone ridicules BlackBerry’s releases of “the Playbook, Z10, Q10, and other devices which simply didn’t sell.” It also said says BlackBerry’s recently unveiled Passport smartphone “is likely the last chance to reinvigorate the Blackberry hardware business; otherwise they will probably shift entirely towards MDM, where they are already at a disadvantage once