Brains are the last frontier of privacy
I'm far less worried about commercial companies doing this than I am worried about governments doing this.<p>Usually when it comes to privacy I can begrudgingly accept that governments will violate it to some degree. This is a field, however, where I think governments must be outright banned from. We <i>must not</i> allow a situation to appear where the TSA or the police will run a quick "brain check" on somebody. It must be avoided. This would be a one way ticket to disaster.