I encourage other people to use them for their own security. My argument for ad blocking has zero to do with advertisements and everything to do with preventing malware.
I often want to share an article but hate the fact that people who'll click will expose themselves to a lot of crap if they're not running a blocker. Obviously I'd rather not link to such sites at all. But with so much of the news media now filled with ads, it's often hard to avoid. I feel a little better doing it through this.
I was also thinking of showing a before and after of the linked site, with and without an ad blocker. :)