Mindreading
There are some advances in technology that in the near future we could be able to visualize thoughts and kind of read minds.
http://www.digitaltrends.com/cool-tech/scientists-develop-brain-decoder-can-hear-inner-thoughts/
(there are other projects aswell but I can't find the link anymore)
What are your general thoughts of this and should we use it to check civilians to bust terrorist, child molesters and other people who commit felonies (maybe even entire drug cartells)? Or is it too much of a privacy invasion?