This news will put a rather large spanner in the works of the console manufacterers:

The biggest fear of those that love to open up their 'consoles' to mod or change parts inside, may soon be over as the big 3 have warned to stop using those nasty 'Warranty Is Void If Removed Stickers' which are in-fact illegal, so don't worry, be happy, rip them off!

So good news for gamers that love to mod in the USA, now we just need similar changes in EU and other smaller markets!

NEWS SOURCE:FTC warns that, yes, those warranty-voiding stickers on consoles are illegal (via) Gamasutra