It is the most reliable protection. Offices pasted over with such a cloth and curtains are protected from harmful effect. However, besides protecting body and face from electromagnetic radiation, we have eyes and ears open for obtaining the information. And not always the information is good to a person. It is not a secret, that a polygraph can be deceived using special tricks of self-regulation.
Psychological methods can decrease efficiency of electro-acoustic effect and a number of others.
Personal safety in the National and International law. There is no public institution, which can inspect and control destructive applications of computer - operator effects. The community appears to be defenseless from methods, which can appear in the hands of a criminal or a terrorist. Certainly we can call applications of a computer effects in InfoWar a humanistic weapon. But there can be no humanity in any weapon at all.