diff --git a/Dynamic filtering: Benefits of blocking 3rd party iframe tags.md b/Dynamic filtering: Benefits of blocking 3rd party iframe tags.md
index 76b9733..3b18022 100644
--- a/Dynamic filtering: Benefits of blocking 3rd party iframe tags.md	
+++ b/Dynamic filtering: Benefits of blocking 3rd party iframe tags.md	
@@ -16,4 +16,14 @@ In the above case, blocking 3rd-party scripts would have been even better, as th
 
 Ultimately, if a site breaks because it really does need legitimate 3rd-party `<iframe>`, then un-blocking `<iframe>` for a specific site is only one click away:
 
-<p align="center"><img src="https://raw.githubusercontent.com/gorhill/uBlock/master/doc/img/dynamic-filtering-8.png" /><br><sup>3rd-party &lt;iframe&gt; tags blocked by default for all sites,<br><b>except</b> for the current site (this was for github.com).</sup></p>
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+<p align="center"><img src="https://raw.githubusercontent.com/gorhill/uBlock/master/doc/img/dynamic-filtering-8.png" /><br><sup>3rd-party &lt;iframe&gt; tags blocked by default for all sites,<br><b>except</b> for the current site (this was for github.com).</sup></p>
+
+### Tracking protection
+
+URL: <http://www.propublica.org/article/meet-the-online-tracking-device-that-is-virtually-impossible-to-block>
+
+Remember the article [ProPublica's _"Meet the Online Tracking Device That is Virtually Impossible to Block"_](http://www.propublica.org/article/meet-the-online-tracking-device-that-is-virtually-impossible-to-block)?
+
+The title is obviously an exaggeration (the tracking _can_ be blocked), but the particular `addthis.com` javascript code which attempts to fingerprint your browser executes from within a 3rd-party `iframe`. Contrary to what Adblock Plus has been claiming on its blog and the media, using _EasyPrivacy_ does **not** prevent AddThis from fingerprinting your browser. This is something I verified and re-verified back then, and unless appropriate filters have been added since last time I checked, it still is the case.
+
+AddThis and countless other 3rd-party which purpose is to data-mine you will be foiled by blocking 3rd-party `<iframe>` tags (even more so if blocking 3rd-party `<script>` tags).
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