His article about the portrayal of women in video games. He could have easily made sexist jokes and get away with it because he's done it before. But he didn't. What he did instead was encourage women in the game industry to create kickass games that would create new standards and ended it with the line "What's wrong? Afraid of making money?". I think even the Maddox haters could get behind that.
What did Maddox do when he found out that the United Arab Emirates had bannedhis website? He personally flew to Dubai to verify that his site is indeed banned, and then left printouts of his home page throughout the city and made a Gag Penis out of the Burj Khalifa, the world's tallest skyscraper.
So yes, essentially I flew 7804 miles (12,560 km) to another country just to litter. I have mastered all things petty. Game over.
His response to SOPA. When the Internet was in the throes of its anti-SOPA furor, he took a different turn and pointed out that as long as the guys who legislated that bill were in charge, they'd just try again and again until it passed. He also generated a massive list of companies that supported it and urged a prolonged boycott. When he received a reply from Dell that their accusation of supporting SOPA was unfounded, he reminds his readers to boycott responsibly.
Upon the tragic passing of Robin Williams, Maddox noted that ABC News was taking aerial coverage of his home while simultaneously reporting that they wanted privacy. He screencapped the image and tweeted it around, and as a result, ABC backed off. Bonus points for getting retweeted by his favorite people.