I think it's a case of waste being in the eye of the observer.
I think my neighbor wasted a ton of money on his fancy new TV, but to him, that TV is great and totally worth the money.
Same here. It's not wasted electricity if the person spending the resource gets the return he wants from it.
@volkris @gwynnion yeah, i actually love sha256-ing stuff,and getting a lot of zeroes, it really flibbles my nipples!