Miners are doing exactly what you describe. They are hash cracking.
Lately it has become a fad to hack the word "hack" and completely misuse it so let's call it "hash hacking".
Miners hack bitcoin, and if they succeed, they can claim 25 BTC.
We are talking about Private Key generations... Can some guru out there have a look at my posts and give some scientific answer to my concerns?
I think not only me, but the Bitcoin community would appreciate that.
https://bitcointalk.org/index.php?topic=961023.msg10511395#msg10511395Satoshi, you there?