Any empty space in a TrueCrypt file that isn't being used for files visible at the top level could presumably contain hidden content - how do you prove it isn't?
(Beyond the obvious Gitmo examples, consider the long list of wrongful convictiobs based on coerced confessions / testimony – I'd sleep easier if there was consistently harsh punishment for those responsible)
Which is true. The public go completely OTT bat shit mental the split second something happens, and governments respond with equally bat shit mental policies. And "we" love it. "We" vote for it.
When the general public say no on mass it will stop and be reversed. Sad fact is, "we" support this, torture and all, as long as we have money for throwaway Chinese consumer garbage.
You can get more secure and have 3 levels, 1: backup of important, sensitive documents (like a scan of your passport & banking details, which you obviously just don't want to leave lying around), 2: Homemade fetish porn 3: Subversive materials.