The people are sensitive enough to read ideas of other people or they are not able to decode them. I mean especially feelings, not mathematical or technical theories or secrets. But people will be able to detect a person that keeps some secret. Lay detectors have been built to do such work. However results of lay detectors are not very reliable.
People are more sensitive than any electronic devices.
They will be able of understanding to the ideas of other people. So we have to ask whether such discovery is good or bad for people. I would like to offer one answer to this question. More information about anyone will bring more open relations among people. Openness is often very good.