If your mp3 is copy protected and your calculator bypasses that copy protection, it is in fact illegal (in the US)
I was thinking they were metaphorical.
Again: ianal. But this is kind of a fundamental right. If you own something, it's yours to do with privately as you wish. If you don't own the copyright, then you can't redistribute.
I don't see much point in making the theoretical argument of "nothing is unhackable". The point of protection isn't to make some absolute defense, it's to mitigate low effort thieves. Any house can bypass a lock by using a cheap hammer on a window, but I'd still call a house lock a "lock".