The word in parenthesis in the post above (I won't add it) is the name of a site which sells mobile phone jammers. If I read the description right, they disable mobile phones within the range of the jammer, preventing them from receiving signals and from transmitting them so they will not help anyone's privacy, just prevent them and anyone else within range from using their phones. I am about to reprt the post.
"A mobile phone jammer or blocker is a device which deliberately transmits signals on the same radio frequencies as mobile phones, disrupting the communication between the phone and the cell-phone base station, effectively disabling mobile phones within the range of the jammer, preventing them from receiving signals and from transmitting them. Jammers can be used in practically any location, but are found primarily in places where a phone call would be particularly disruptive because silence is expected, such as entertainment venues.
Because they disrupt the operations of legitimate mobile phone services, the use of such blocking devices is illegal in many jurisdictions, especially without a licence. When operational, such devices also block access to emergency services."
