3 papers
cs.SI2026
DeTox-Fed: Detecting Toxic Conversations in the Fediverse with Federated Graph Neural Networks
Pantelitsa Leonidou, Nikos Salamanos, Sotiris Gypsiotis +1
The rise of decentralized social networks (DSNs), and in particular the rapid uptake of the Fediverse (e.g., Pleroma, Mastodon, Lemygrad), introduces new challenges in content mode…
cs.SI2026
Roll in the Tanks! Measuring Left-wing Extremism on Reddit at Scale
Utkucan Balcı, Michael Sirivianos, Jeremy Blackburn
Social media's role in the spread and evolution of extremism is a focus of intense study. Online extremists have been involved in the dissemination of online hate, mis- and disinfo…
cs.SI2025
Exploring Left-Wing Extremism on the Decentralized Web: An Analysis of Lemmygrad.ml
Utkucan Balci, Michael Sirivianos, Jeremy Blackburn
This study investigates the presence of left-wing extremism on the Lemmygrad.ml instance of the decentralized social media platform Lemmy, from its launch in 2019 up to a month aft…