What do they have to say concerning sharpening the phone to a fine point and stabbing yourself with it? Or coating it in honey and choking while trying to swallow it? Or lighting it on fire for warmth but having it set your clothes on fire when you put it in your pocket?
The FCC doesn't really care if you can stab yourself with your phone. They do require that phones stay below a certain level of radiation output (which given root access, it's possible to muck with), thus a disclaimer is necessary to make it clear the user's the one screwing up the radio, not HTC's unlocker.
In a Common Law system such as the one used in the US, law is interpreted to the letter and if something is not mentioned in a contract then it's considered undefined, no matter whether it's reasonable. So even though we can argue that sharpening the phone and stabbing yourself is a foolish thing to do, the law system pretty much requires them to explicitly mention these things or they may be held liable in court. This is also the reason why American contracts are so fscking long compared to most European contracts which follow Civil Law.
