diff --git a/man/grpck.8.xml b/man/grpck.8.xml
index 77c4bd86..d1661614 100644
--- a/man/grpck.8.xml
+++ b/man/grpck.8.xml
@@ -34,7 +34,6 @@
 <!-- SHADOW-CONFIG-HERE -->
 ]>
 <refentry id='grpck.8'>
-  <!-- $Id$ -->
   <refentryinfo>
     <author>
       <firstname>Julianne Frances</firstname>
@@ -192,6 +191,17 @@
 	  </para>
 	</listitem>
       </varlistentry>
+      <varlistentry>
+        <term><option>-S</option>, <option>--silence-warnings</option></term>
+        <listitem>
+          <para>
+            Suppress more controversial warnings, in particular warnings about
+            inconsistency between group members listed in
+            <filename>/etc/group</filename> and
+            <filename>/etc/ghadow</filename>.
+          </para>
+        </listitem>
+      </varlistentry>
     </variablelist>
     <para>
       By default, <command>grpck</command> operates on
diff --git a/src/grpck.c b/src/grpck.c
index e6216efa..39e2ec2c 100644
--- a/src/grpck.c
+++ b/src/grpck.c
@@ -33,8 +33,6 @@
 
 #include <config.h>
 
-#ident "$Id$"
-
 #include <fcntl.h>
 #include <grp.h>
 #include <pwd.h>
@@ -82,6 +80,7 @@ static bool gr_locked = false;
 /* Options */
 static bool read_only = false;
 static bool sort_mode = false;
+static bool silence_warnings = false;
 
 /* local function prototypes */
 static void fail_exit (int status);
@@ -158,6 +157,7 @@ static /*@noreturn@*/void usage (int status)
 	                "                                but do not change files\n"), usageout);
 	(void) fputs (_("  -R, --root CHROOT_DIR         directory to chroot into\n"), usageout);
 	(void) fputs (_("  -s, --sort                    sort entries by UID\n"), usageout);
+	(void) fputs (_("  -S, --silence-warnings        silence controversial/paranoid warnings\nn"), usageout);
 	(void) fputs ("\n", usageout);
 	exit (status);
 }
@@ -193,18 +193,19 @@ static void process_flags (int argc, char **argv)
 {
 	int c;
 	static struct option long_options[] = {
-		{"help",      no_argument,       NULL, 'h'},
-		{"quiet",     no_argument,       NULL, 'q'},
-		{"read-only", no_argument,       NULL, 'r'},
-		{"root",      required_argument, NULL, 'R'},
-		{"sort",      no_argument,       NULL, 's'},
+		{"help",             no_argument,       NULL, 'h'},
+		{"quiet",            no_argument,       NULL, 'q'},
+		{"read-only",        no_argument,       NULL, 'r'},
+		{"root",             required_argument, NULL, 'R'},
+		{"silence-warnings", no_argument,       NULL, 'S'},
+		{"sort",             no_argument,       NULL, 's'},
 		{NULL, 0, NULL, '\0'}
 	};
 
 	/*
 	 * Parse the command line arguments
 	 */
-	while ((c = getopt_long (argc, argv, "hqrR:s",
+	while ((c = getopt_long (argc, argv, "hqrR:sS",
 	                         long_options, NULL)) != -1) {
 		switch (c) {
 		case 'h':
@@ -221,6 +222,9 @@ static void process_flags (int argc, char **argv)
 		case 's':
 			sort_mode = true;
 			break;
+		case 'S':
+			silence_warnings = true;
+			break;
 		default:
 			usage (E_USAGE);
 		}
@@ -456,7 +460,7 @@ static void compare_members_lists (const char *groupname,
 				break;
 			}
 		}
-		if (*other_pmem == NULL) {
+		if (!silence_warnings && *other_pmem == NULL) {
 			printf
 			    ("'%s' is a member of the '%s' group in %s but not in %s\n",
 			     *pmem, groupname, file, other_file);