From: CJB on
On Dec 21, 4:43 pm, James Mar...(a)hgvu.com wrote:
> On Sun, 20 Dec 2009 22:14:53 -0000, Jon <s...(a)jonparker.plus.com>
> wrote:
>
> >> I don't know whether its legal or not to use a mobile phone jammer.
>
> >If it's an active transmitter type then it's not legal in the UK. You
> >can passively "block" rather than "jam" suing techniques like faraday
> >cages when contructing buildings etc.
>
> >> There is a big different between legal and lawful though and if you're
> >> only jamming mobile phone signals not other communications from the
> >> train I don't see the problem. If some idiot can't have a phone
> >> conversation at 6am in the morning without raising his voice, I say by
> >> all means switch on your jammer inside your bag. You have the right
> >> not to be disturbed by loud shouting, music or from radio, magnetic or
> >> other energies passing through your body. So jam away. I call it as
> >> lawful excuse. Protection from harassement I say.
>
> >I agree with your sentiments, but active jammers, however noble the
> >intent, are illegal in the UK. Two wrongs don't make a right. Just my
> >opinion.
>

In Japan these devices are called Wave Walls - they're used to screen
theatres and cinemas amongst other venues. CJB.