>Does this mean that any digital conspiracy you can dream up involving the NSA is probable?
No. If I dreamed up that the NSA was using frequencies in CPUs to control our behaviors and increase our orange juice consumption, there are still reasons to not treat that one as having any reasonable probability of being true, compared to the notion that the NSA is working to get back-doors into software. Reasons for this difference in probability are based on feasibility, implications if true, how specific the claim is, and if it is in line with past behaviors.