Law Enforcement agencies should take note, this simple trick can fool most wiretaps. Check the Wired article How To: Foil Wiretaps at Home.
Think the Feds might be jacked into your home line? Well, there’s no need to skulk down to the corner pay phone to conduct your business. All you need is a C note. University of Pennsylvania computer science professor Matt Blaze dissected the wiretap equipment commonly used by law enforcement and found a few, um, bugs. Spies, it turns out, don’t like to record dead air, so they turn the system off by playing a special C-pitched tone when the target phone is hung up.
