What if you sold microwaves and told people not to put aluminum foil in them, yet they continuously do and, sho nuff, the thing breaks.
Not even close to the same thing. Putting software on a computer is a common thing to do, and is encourraged on other Apple computers. Soon SDK apps will be out.
As I pointed out, Apple has the ability to easily un-jailbreak if it wishes.
At first, Apple stores quietly replaced many phones when the first update bricked them, because they were trying to avoid bad publicity and possible legal action. And Jobs just shrugged off hackers, saying it was "a game".
I think that later, Apple realized how much money they could save by avoiding warranty work, especially on the first phones which appear to be more prone to losing their touchscreen.
If you don't like the warranty restrictions, don't go complaining when messin' around screws up the perty little phone.
Jailbreaking doesn't void the warranty. It's the same basic warranty that your MacBook has.
Apple counts on people like you, who've never read and understood the warranty. The warranty is about hardware, not software. It's only bans unauthorized
hardware mods or fixes.
Even Apple has never said jailbreaking voids the warranty, because it doesn't. They simply don't honor their warranty, which is quite different.