Re: Why would this happen-
Trouble is they tried this at a local prison and half the neighbouring streets were also blocked! It took a visit from OFCOM to explain that the transmissions out of prison property were illegal on many counts! The blocking was stopped several WEEKS later. The suggestion to block WiFi is just the sort of thing that non-technical people spout out when trying to make a name for themselves. Can you imagine the ovation a speech like this would get at the next Tory conference? Why not put some modulation on the jammer so that plod can follow where the miscreants go? Er by the way, what about 5GHz, is that blocked too?