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).
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).
