Don't want to pay the UK TV License Fee? Here's the answer:
"The new tv cloaking app (iPhone 4s, Samsung Galaxy etc).
Point your wifi enabled device at your tv when the goon comes knocking it cloakes your tv within seconds leaving the tv licence inspector well and truly shafted.
Available in the app store at just £1.45 which is a fraction of the cost of a tv licence."
Unfortunately there appears to be a snag:
"EDIT : Just read the app instructions fully as I couldn't get the tv back. Apparently you have to buy a bloody tv licence to get an activation code to make your telly reappear. Looks like TVL™ are in cahoots with Apple and Samsung. Doh!"
http://www.tvlicenceresistance.info/forum/index.php/topic,6004.0.html