I was using Bastille to improve the security of OS and I found the next question there I don't know if I should answer for YES or NOT:

Questions:

Would you like to set more restrictive permissions on the administration utilities?

Explanation:

In general, the default file permissions set by most vendors are fairly secure.
To make them more secure, though, you can remove non-root user access to some administrator functions.

If you choose this option, you'll be changing the permissions on some common system administration utilities so that they're not readable or executable by users other than root. These utilities (which include linuxconf, fsck, ipconfig, runlevel and portmap) are ones that most users could never have a need to access. This option will increase your system security, but there's a chance it will inconvenience your users.

My users:

When I installed Ubuntu I had create a user (admin), then I was able to create another user (people) but I cannot change the permissions of this user.

Questions:

The user there I am using like admin it's not the root, right?

The effects of this option will affect to the two users (admin & people) or just to people?