Creating "absolute random noise on a disk" is not easy either since the entropy available on any given machine is probably minuscule compared to the disk space. Writing pseudorandom bits on a disk will not be sufficient to hide non-pseudorandom, encrypted data, especially if the data is big.

They're housewives...

Good grief! They're probably doing that "menial" job better than you possibly could. Where do you get the self-righteous pretension to talk down to housewives? Maybe it's puberty that fried *your* brain. Do you honestly think software engineering is more important than homemaking?

Well, it's obvious that you do, and you're what's wrong with the educational system.