I guess, yes: if you aren't going to use Facebook for three years, maybe you should disable your account before you leave.
However, this is still somewhat sensationalistic: the concept of these social ads was very clearly laid out as one of the launch features of Pages back in 2007.
https://blog.facebook.com/blog.php?post=6972252130
"""Ads will be getting more relevant and more interesting to you. Instead of random messages from advertisers, we've launched Social Ads. Social Ads provide advertisements alongside related actions your friends have taken on the site. These actions may be things like "Leah is now a fan of The Offspring" (if I added The Offspring to my music) or "Justin wrote a review for Sushi Hut" (If Justin wrote this review on the Sushi Hut page). These actions could then be paired with an ad that either The Offspring or Sushi Hut provides."""
As for this specific feature to turn off these kinds of advertisements, that has existed since just about three years ago: January of 2010 is when they launched the new expanded Facebook privacy settings feature, and this is one of the settings people were talking about.
http://www.insidefacebook.com/2010/01/19/how-to-protect-your...
The scope of when and where they appear has changed somewhat over time, especially in early 2011 with the new "sponsored stories" feature, but the idea of how this feature will work and what it means has been there for much longer than that.
http://www.insidefacebook.com/2011/01/24/sponsored-stories-f...
Then, in 2012, they added these stories to the news feed (where they were in this article). Again: the places where these ads are shown has changed somewhat over time, but this is the exact same feature and privacy implication as all the earlier variants.
http://www.insidefacebook.com/2011/12/20/facebook-to-introdu...
I'm thereby somewhat at a loss as to what the real issue is here, or why this is suddenly "news" to anyone: nothing has really changed in how Facebook treats these ads in many years; I'd even go so far as to say in this specific case, they haven't done it ever, but they certainly haven't done it in the last 5 years (since 2007).
Regardless, you certainly have had many years now to understand and deactivate this feature: if someone, such as the author of this original post (not you, as maybe you haven't used Facebook since 2009), really care about your privacy, and somehow at the end of 2012 you haven't noticed a giant feature linked both from "Settings" and from "Privacy" on a website that is holding tons of personal information about you, I question whether you (again, OP) really care about your privacy ;P.