Greetings: I thought I would go ahead and confirm this one. I noticed it myself today, and I wanted to follow up here.
I recommend that we remove the check and the warning entirely. First, the warning is already incorrect. It may mislead someone into thinking that they can remove a group that still as members. Second, an empty group is in many if not most cases NOT an error. There are several standard groups that may be empty on a given system (e.g., "cdrom" or "adm"). Third, I believe that this is a case of "deluser" being a bit too helpful. We should only be worried about whether a group is empty or not when deleting a group. Otherwise, it is on the sysadmin to check for empty groups if they are not desired. Is my reasoning sound here? If so, I'll work on this one after I finish the bug I'm working on currently. It should be an easy win! -- Jason Franklin