Sudo & su

[Vivek J. Patankar]

A user with sudoer privileges is able to get root using "sudo su -". I 
find this extremely irritating. I prefer to keep access to root limited 
number of administrators in my organisation, but the applications 
running on the system require the application owners to be able to run 
root only commands. It seems this be a global behavior, I have seen it 
on RHEL, Fedora and AIX5.3.
Is there a way to force the system to request for the root password? Or 
restrict 'sudo' users from using 'su'?

-- 
Regards,
विवेक ज. पाटणकर (Vivek J. Patankar)

Registered Linux User #374218
Fedora release 7 (Moonshine)
Linux 2.6.22.4-65.fc7 x86_64