[dragonwriter]

> You lose warranty coverage completely, right?

In many jurisdictions, warranties against manufacturing defects (perhaps with a certain limited duration) are mandated by law and non-waivable, and language which purports to disclaim them or have the customer agree to a waiver has no legal effect. To the extent a warranty is discretionary or waivable and properly waived, such an act may void the warranty, but that's not as often the case as simply reading manufacturers disclaimer language would suggest.