diff --git a/util/global_community_block.php b/util/global_community_block.php
new file mode 100755
index 0000000000..cb6789e45c
--- /dev/null
+++ b/util/global_community_block.php
@@ -0,0 +1,65 @@
+#!/usr/bin/env php
+<?php
+
+/**
+ * @brief tool to block an account from the node
+ *
+ * With this tool, you can block an account in such a way, that no postings
+ * or comments this account writes are accepted to the node.
+ *
+ * Usage: pass the URL of the to be blocked account as only parameter
+ *        at the command line when running this tool. E.g.
+ *
+ *        $> util/global_community_block.php http://example.com/profile/bob
+ *
+ *        will block bob@example.com.
+ *
+ * Author: Tobias Diekershoff
+ *
+ * License: AGPLv3 or later, same as Friendica
+ **/
+
+if ($argc != 2 || $argv[1] == "-h" || $argv[1] == "--help" || $argv[1] == "-?") {
+	echo "Usage: ".$argv[0]." [-h|profile_url]\r\n";
+	echo "    -h, -?, --help ... show this help\r\n";
+	echo "    profile_url ...... The URL of the profile you want to silence\r\n";
+	echo "\r\n";
+	echo "Example: block bob@example.com\r\n";
+	echo "$> ".$argv[0]." https://example.com/profiles/bob\r\n";
+	echo "\r\n";
+	exit(0);
+}
+
+use Friendica\Database\DBM;
+use Friendica\Network\Probe;
+
+require_once 'boot.php';
+require_once 'include/dba.php';
+require_once 'include/text.php';
+$a = get_app();
+require_once '.htconfig.php';
+
+dba::connect($db_host, $db_user, $db_pass, $db_data);
+unset($db_host, $db_user, $db_pass, $db_data);
+
+/**
+ * 1. make nurl from last parameter
+ * 2. check DB (contact) if there is a contact with uid=0 and that nurl, get the ID
+ * 3. set the flag hidden=1 for the contact entry with the found ID
+ **/
+$net = Probe::uri($argv[1]);
+if (in_array($net['network'], array(NETWORK_PHANTOM, NETWORK_MAIL))) {
+	echo 'This account seems not to exist.';
+	echo "\r\n";
+	exit(1);
+}
+$nurl = normalise_link($net['url']);
+$r = dba::select('contact', array('id'), array('nurl' => $nurl, 'uid' => 0), array('limit' => 1));
+if (DBM::is_result($r)) {
+	dba::update('contact', array('blocked' => true), array('id' => $r['id']));
+	echo "NOTICE: The account should be blocked from the node now\r\n";
+} else {
+	echo "NOTICE: Could not find any entry for this URL (".$nurl.")\r\n";
+}
+
+?>