[Darth Reardon]

For example, the ‘ls’ command runs as root, so any user can see any other user’s processes

Is that a Mac silliness? ls (or ps, which you probably meant) certainly aren't suid on RHEL.

[proxy_user]

Yeah, I mistyped ‘ls’ when I meant ‘ps’. If I did that on a command line, I would soon see my mistake when I get a list of my files instead of my processes. Ooops!

But this is true on all Unix machines the ‘ps’ command must be SUID root, or you could only ever see your own processes.