[saalweachter]

You know, the problem with lists like this is that, once you've made the list, any organization with a cover-your-ass mentality (eg, every organization) is going to treat it as sacrosanct. Regardless of how flimsy the list was to start with, no amount of evidence can ever clear someone well enough. The risk isn't "chance of being wrong * real-world consequences of being wrong", it's "chance of being wrong * (real-world consequences of being wrong + career consequences of 'letting the guy on the known-threat list slip through')". The career consequences have infinite weight, so the chance of being wrong can never be low enough.