Iggy, I know your situation just too well, and having information that you cannot use for anything can be a burden(in fact, I would sometimes prefer not to know, when I can't do anything anyway).

If the info is classified or other reasons makes it impossible for you to reveal your knowledge, you just have to live with it, and shake it off.

On the other hand: If its "only" a moral aspect that holds you back, throw it into their faces :)

/The Doc
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You'll never get to heaven if you're scared of getting high...