[CentOS] strange su behavior

[John R Pierce]

Uwe Kiewel wrote:
> [root at halifax ~]# useradd test00
> [root at halifax ~]# su - test00
>
>
> We trust you have received the usual lecture from the local System
> Administrator. It usually boils down to these three things:
>
>     #1) Respect the privacy of others.
>     #2) Think before you type.
>     #3) With great power comes great responsibility.
>
> Password:
> ...

that almost sounds like sudo, not su.   is it aliased or something?