Bug #295416 seems to be a general design issue�: should userdel try to remove the group the user it deletes belonged to if this is a "user group".
If it doesn't, then admins are likely to keep up with dozens of remaining user groups. Indeed, we cannot change this silently. However, if for some (good or bad) reason, the suer groups has other members than the currently deleted user, I agree with the bug submitter�: userdel should at least issue a warning....or maybe even *not* delete the group (and issue an "error" message). Any thoughts�? --

