[shadowgovt]

Are you assuming a brain-scanning technology wouldn't be opt-in? I figure the mechanical nature of it would make it difficult to implement in any other way... If someone doesn't want to be scanned, they can take the helmet off.

[canjobear]

It could be made involuntary in the context of, for example, interrogations.

[brightstep]

Can't wait until law enforcement can compel me to put on the mind reading device.

[NortySpock]

Maybe in court we can make it like discovery or cross-examination...

"Ok, I'll agree to using the mind-reader, but only if I can use the mind-reader on you as well..."

Daniel Suarez touched on a proto-society developing with fMRI mind-reading in his Daemon series of books. Higher levels of authority required more frequent rounds of time in the mind-reader taking loyalty/polygraph tests.

[booleandilemma]

It’ll only be used every time you fly. And attend sporting events. And when you’re pulled over for a traffic violation. And in schools.