You can call it whatever you want, but there are hard working people in the world that don't violate thier contract and steal tethering. By you choosing to steal it without reservation, the implication is that the people who ARE choosing to do the right thing and abide their agreement are somehow suckers for doing so.
I wonder how many people admit to Apple they have violated their warranty when they have an issue (related or not) and they need warranty work?
I guess that's ok to steal that too?
Look, I really don't care what anyone does with their life if they don't matter to me. The world is full of hypocrites, liars, and people who steal. Whatever floats your boat...
What do you have to say about the dozens of devices that tether for free on AT&T without issue? My old phone before my iPhone, a Samsung Windows Mobile phone, supported native tethering and AT&T didn't do anything about that, and that was on an unlimited plan! The contract doesn't disallow tethering. You are quite literally paying extra to simply enable the iPhones native tethering ability.
I'm strongly against piracy, I believe that if someone makes something, and you think the price is unfair, then you don't buy it. You don't just 'take it' (or copy it or however else they justify it) because you claim you can't afford it or wouldn't ever buy it. However, I don't see the connection here. I don't jailbreak for piracy, and I wouldn't ask Apple to support Cydia or the Jailbreak software. But if I had a hardware failure not caused by the jailbreak, then yes, I'd expect Apple to keep their end of the bargain and fix it for me.
The Magnuson-Moss warranty act in the United States prevents Apple (and any other company) to void a warranty on unrelated things. The act states that a warranty cannot be voided by modifying the product. By modifying the software, Apple can refuse to support the software, but they cannot refuse to support the hardware. By returning the device to it's original state (restoring) then they once again need to support the software unless they can PROVE the modification caused an issue.
This is just software, simple software being installed. That's it. If I screwed up my iPhone installing a weird glow-light behind the Apple logo or installing colored plastic pieces, I wouldn't expect Apple to fix it. But this morning when I jailbroke my phone, all I did was install a piece of software.