It’s unreasonably early in Philadelphia, and we’re at the start of the AoIR 2023 conference proper. I’m in a panel on extremism, and we start with Shawn Walker, Michael Someone, and Ben Gansky, whose focus is on the 6 January 2021 insurrection in the United States. This focusses especially on the role of Gab, Parler, and Rumble, and other alt-tech Websites; it builds on an influencer dataset containing Trumpist influencers; an NYU dataset of Parler posts; and a Twitter dataset of tweets by 13 people who objected to the certification of the 2020 election results, which includes the deleted tweets …