So much this! Any radio beam which was strong enough to affect human tissue would drive a basic EM detector crazy. A suitable detector would be a simple wire

So much this! Any radio beam which was strong enough to affect human tissue would drive a basic EM detector crazy. A suitable detector would be a simple wire dipole, a schottky diode and a meter. Any radio hobbyist could make you one in a few minutes. Plus such a strong field would drive most domestic electronics equipment crazy due to our crappy RF immunity regulations..