. . .
Not a shock to anyone who took the time to read their privacy statement and anonymity information publicly available on their website:
https://blockchain.info/wallet/anonymity. . .
The only shock was that another business managed to access this information, and that has been addressed appropriately.
Hashing it would not prevent looking it up if programmed that way. But would prevent it from being plaintext in the database. You can't hash the email or the sms because you use those to send notices.
I don't believe I requested hashing of anything.