"False Advertising" doesn't even begin to cover it. The parallel that any smart plaintiff should be making in court is this:
"Imagine if you just bought a brand new Toyota Prius. Now, you're buying it because it's a hybrid car; that's its primary function. However, it also has things like "stereo" and "air conditioning" which factored into your decision to purchase it. Now imagine that a year or so after you purchase your car, it's summer, and you're quite happy that you have air conditioning, and in fact have come to rely on this to make your long hot commutes livable. All of a sudden, a Toyota representative comes by your house, uses the special skeleton key that lets him get into any Prius they've manufactured, and pulls out your AC unit. You tell him to stop, but he shows you that the contract you signed when "purchasing" the car states that you don't actually own it, and that Toyota can still do whatever they want with it. He also tells you that if you'd known about it ahead of time, you could have changed your locks, but that would've voided your car's lifetime warranty and also stopped you from driving on the highway.