Bill Studenmund wrote:
> PAM on top of BSD Auth isn't really PAM, and so it's not really
> interesting.
> 
> What's wrong with BSD Auth on top of PAM? If you want to do BSD Auth,
> there it is.

Because then if I want to use just BSD Auth, I can't avoid PAM. 
Because complex on top of simple is better than otherwise for many
other reasons.