From mboxrd@z Thu Jan  1 00:00:00 1970
From: jnc@mercury.lcs.mit.edu (Noel Chiappa)
Date: Fri, 27 Apr 2018 12:42:12 -0400 (EDT)
Subject: [TUHS] rm command
Message-ID: <20180427164212.BD94718C088@mercury.lcs.mit.edu>

    > From: Dave Horsfall <dave at horsfall.org>

    > I am constantly bemused by the number of "setuid root" commands, when a
    > simple "setgid whatever" will achieve the same task.

  http://minnie.tuhs.org/cgi-bin/utree.pl?file=V6/usr/sys/ken/sys4.c

  /*
   * Unlink system call.
   */

  unlink()
  {	...

	if((ip->i_mode&IFMT)==IFDIR && !suser())
		goto out;

For many things, yes. Not in this particular case.

	Noel