Added a warning within "complaint.conf" action about care with enabling it

config/action.d/complain.conf

@@ -12,8 +12,22 @@
 # any other addresses found in the whois record, with a few exceptions.
 # If no addresses are found, no e-mail is sent.
 #
-# $Revision$
+# WARNING
+# -------
 #
+# Please do not use this action unless you are certain that fail2ban
+# does not result in "false positives" for your deployment.  False
+# positive reports could serve a mis-favor to the original cause by
+# flooding corresponding contact addresses, and complicating the work
+# of administration personnel responsible for handling (verified) legit
+# complains.
+#
+# Please consider using e.g. sendmail-whois-lines.conf action which
+# would send the reports with relevant information to you, so the
+# report could be first reviewed and then forwarded to a corresponding
+# contact if legit.
+#
+
 
 [Definition]