Because saying something is "cracked" because it's in data-set A is worthless. The answer to your question is encoded in the technique of your choice in Pi. It's also because this "crack" is so ridiculously easily negated - salt your hashes. It's an amateur thing that everyone should be doing.
There's no cracking going on here, just short-cutted brute-force attacks.
There's no cracking going on here, just short-cutted brute-force attacks.