When Sarah Palin's "personal" email was hacked during the 2008 election, the attacker used her Wikipedia page and recovery questions.[0]
Just because they didn't impress you by finding a side channel timing attack for the password hashing algorithm used by Yahoo, doesn't make it any less of a hack.
Why spend millions investing in a network of computers to break encryption, when the key can be gained far more easily with a $20 tire wrench applied with sufficient force to the DBA's knee caps?
Having a cat named 1FD362BW9L6MBOWRD23SEF43 becomes a huge problem...
So, I could very well have my mother's maiden name be "panda porpoise flutist sandpile", but I understand what you're saying. It may not be for everyone, but I work in the security sector and usually over-paranoid is better than ill-prepared.
I'm sure other tools like KeePass have similar sections to do the same thing.
That way the answers aren't reproducible and you have them safely stored somewhere.