diff --git a/README b/README
index 81532f5..7512bb8 100644
--- a/README
+++ b/README
@@ -1,8 +1,17 @@
 Bash scripts for Hackerspace.pl LDAP administration.
+====================================================
 
 To activate, type bin/activate.
 
 To get help, type help.
 
-The effects of issued commands end up in a buffer file, by default ~/.ldap-admin.ldif . To make them persistent, issue the commit command. If successful, it will clear the buffer. Otherwise the buffer will remain unchanged.
+The effects of issued commands end up in a buffer file, by default
+~/.ldap-admin.ldif . To make them persistent, issue the commit command. If
+successful, it will clear the buffer. Otherwise the buffer will remain
+unchanged.
 
+
+Misc
+----
+misc/ directory contains random tools used for internal management (eg. mailing
+lists sync) that don't really need a separate repository.
diff --git a/misc/sensitivefilter.py b/misc/sensitivefilter.py
new file mode 100644
index 0000000..1012e47
--- /dev/null
+++ b/misc/sensitivefilter.py
@@ -0,0 +1,127 @@
+#!/usr/bin/env python2
+# - * - encoding: utf-8 - * -
+"""sensitivefilter.py
+
+Simple tool to synchronize Warsaw Hackerspace internal mailman mailing list
+(WAW-S) with LDAP group members.
+"""
+
+__author__ = "Sergiusz 'q3k' Bazanski <q3k@hackerspace.pl>"
+
+
+import getpass
+import json
+import subprocess
+from email.mime.text import MIMEText
+from distutils.util import strtobool
+
+import ldap
+#import requests
+import urllib2
+
+SPECIAL = {
+    # People who prefer non-@hackerspace.pl emails
+    'seb': "s@informa.pl",
+    'enki': "enki@fsck.pl",
+    'pixel': "kkocel20@gmail.com",
+    'ar': 'arachnist@i.am-a.cat',
+}
+
+def ldap_connect():
+    c = ldap.initialize('ldap://ldap.hackerspace.pl')
+    c.start_tls_s()
+    #c.simple_bind_s('uid=q3k,ou=People,dc=hackerspace,dc=pl', getpass.getpass('LDAP password for q3k: '))
+    return c
+
+def get_target_subscriptions(c):
+    data = c.search_s('ou=People,dc=hackerspace,dc=pl', ldap.SCOPE_SUBTREE,
+                      '(&(objectClass=hsMember)(|(memberOf=cn=fatty,ou=Group,dc=hackerspace,dc=pl)(memberOf=cn=starving,ou=Group,dc=hackerspace,dc=pl)(memberOf=cn=potato,ou=Group,dc=hackerspace,dc=pl)))', ('uid',))
+    emails = []
+    for dn, obj in data:
+        uid = obj['uid'][0]
+        #okay = is_paying(uid) or is_potato(uid)
+        okay = True
+        if not okay:
+            print "Skipping {}, because he's not a member.".format(uid)
+        else:
+            if uid in SPECIAL:
+                emails.append(SPECIAL[uid])
+            else:
+                emails.append('{}@hackerspace.pl'.format(uid).lower())
+    return set(emails)
+
+
+def get_current_subscriptions():
+    p = subprocess.Popen(('/var/lib/mailman/bin/list_members', 'waw-sensitive'),
+                         stdout=subprocess.PIPE)
+    out, err = p.communicate()
+    current = [m.strip() for m in out.split('\n') if '@' in m]
+    return set(current)
+
+
+def add_users(users):
+    p = subprocess.Popen(('/var/lib/mailman/bin/add_members', '-r', '-', '-w', 'y', 'waw-sensitive'),
+                         stdin=subprocess.PIPE, stdout=subprocess.PIPE)
+    p.communicate('\n'.join(users))
+
+
+def remove_users(users):
+    p = subprocess.Popen(('/var/lib/mailman/bin/remove_members', '-f', '-', 'waw-sensitive'),
+                         stdin=subprocess.PIPE, stdout=subprocess.PIPE)
+    p.communicate('\n'.join(users))
+
+
+def notify(add, remove, address):
+    if len(add) == 0 and len(remove) == 0:
+        return
+    message = u"Cześć! \n\n"
+    if add:
+        message += u"Na listę zostały zasubskrybowane następujące adresy email:\n"
+        message += '\n'.join(' - {}'.format(m) for m in add)
+        message += '\n'
+    if remove:
+        message += u"Z listy zostały usunięte następujące adresy email:\n"
+        message += '\n'.join(' - {}'.format(m) for m in remove)
+        message += '\n'
+    message += u'\n\n--\nPozdro 600,\nAutomat do Subskrybowania Adresów po Listach'
+
+    msg = MIMEText(message, "plain", "utf-8")
+    msg['From'] = 'HS BOFH <bofh@hackerspace.pl>'
+    msg['To'] = address
+    msg['Subject'] = 'Zmiany na liście WAW-Sensitive'
+    p = subprocess.Popen(["/usr/sbin/sendmail", "-t"], stdin=subprocess.PIPE)
+    p.communicate(msg.as_string())
+
+
+if __name__ == '__main__':
+    c = ldap_connect()
+    target = get_target_subscriptions(c)
+    target.add('bofh@hackerspace.pl')
+    current = get_current_subscriptions()
+    to_add = target - current
+    to_remove = current - target
+
+    print "Will add", to_add
+    if not strtobool(raw_input("Proceed? yes/no").lower()):
+        to_add = False
+    
+    print "Will remove", to_remove
+    if not strtobool(raw_input("Proceed? yes/no").lower()):
+        to_remove = False
+    
+    if to_add:
+        add_users(to_add)
+        print "Added", to_add
+    else:
+        print "Not adding any addresses"
+
+    if to_remove:
+        remove_users(to_remove)
+        print "Removed", to_remove
+    else:
+        print "Not removing any addresses"
+
+    if to_add or to_remove:
+        notify(to_add, to_remove, 'waw-sensitive@lists.hackerspace.pl')
+
+