Index: en_US.ISO8859-1/books/handbook/basics/chapter.xml
===================================================================
--- en_US.ISO8859-1/books/handbook/basics/chapter.xml
+++ en_US.ISO8859-1/books/handbook/basics/chapter.xml
@@ -388,6 +388,12 @@
 	  <systemitem class="username">news</systemitem>, and
 	  <systemitem class="username">www</systemitem>.</para>
 
+	<warning>
+	  <para>Care must be taken when using the operator group, as
+	    unintended superuser-like access privileges may be
+	    granted.</para>
+	</warning>
+
 	<indexterm>
 	  <primary>accounts</primary>
 	  <secondary><systemitem