[caf]

While it is certainly a good idea, as a user, to assume that the site developers have done things wrong (and therefore choose a strong, random, unique password), it is also a good idea, as a site developer, to assume that your users are doing things wrong (and therefore choose a strong password hashing method).

[derrickpetzold]

Security through obscurity is never a good idea because it leaves a false sense of security.

I know I am getting totally destroyed here by the down voting and I'll probably end up in negative karma for this but I standby all of it.

[caf]

I am not advocating security through obscurity.

I am saying that your advice is appropriate for users (who cannot control what the server does) but inappropriate for servers (who cannot control what the user does).