All it will take is one fairly big mainstream Q proof all the rest will be brought in to focus. FB being CIA is tantalizingly close to being proof, and not full on tinfoil hat. But not quite there. The lifelog closure and FB start date "coincidence" is good. DARPA employees, good. But you're right, it's still quite a fringe notion. What is missing to make it a slam dunk? Do we need documents, FOIA? I just can't quite piece it together unfortunately.
(posting boobs on all my posts in case I accidentally hit the magic number)