Counterpoint: "Doing it for the lulz" can still observerbly result in radicalization. Tangentally, Poe's law applies to online communities where the original group is satirical, but gradually accretes people who take it very seriously. IIRC, there was a subreddit that started as trolling/satire, and later on became the real hateful thing, and after many years of popularity, was subsequently banned after being featured in the national press.