FBI Surveillance Tools
Interesting blog post from EFF.
Posted on May 12, 2011 at 6:24 AM
A similar argument was used for listening in on phones where the receiver hadn't been replaced properly. The argument, which held up in court, was that the speech was public.
Accidentally leaving phones off hook suddenly became very common among suspects - of course you can with a voltage spike force an old fashioned analogue phone to go off-hook, but f course law enforcement would never do anything so underhand
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