hi,
as a normal user i attemped to run:
#zypper lp

and it didn't complain-about/ask-for root privilege unlike:
#zypper in my_package.rpm
> Root privileges are required for installing or uninstalling packages.

which caused zypper failing to mount the repos i have:

> Failed to mount /SOURCE/source/iso/openSUSE-Leap-42.1-DVD-x86_64.iso on /var/tmp/AP_0xBPi6XB: Mounting media failed (mount: only root can use "--options" option)
> Abort, retry, ignore? [a/r/i/? shows all options] (a):



my zypper version is 1.12.40
i think you shouldn't be able to start zypper lp/lu without root