Sentence:  At first, trolling was simply an apolitical form of amusement — web posting as performance art. The image board 4chan soon became its mecca. / Over time, however, the trolls began moving from joking about racism to advocating it in their desire to become ever more <WSD>edgy</WSD>. Andrew Anglin, creator of the neo-Nazi website the Daily Stormer and a longtime troll before that, described the transformation process in a lengthy post on his blog: / “The sentiments behind the jokes slowly became serious, as people realized they were based on fact," he wrote. "Non-ironic Nazism [began] masquerading as ironic Nazism.” 
Meaning of the word marked with <WSD> tags:  Exhibiting behavior that is disconcerting or alarming, sometimes in an effort to impress or to troll others.