text: Furthermore, while user-generated content sites like Reddit, 
  Twitter, and Wikipedia present themselves as open and accessible 
  to anyone, there are structural factors including moderation prac- 
  tices which make them less welcoming to marginalized populations. 
  Jones [64] documents (using digital ethnography techniques [63]) 
  multiple cases where people on the receiving end of death threats 
  on Twitter have had their accounts suspended while the accounts 
  issuing the death threats persist. She further reports that harass- 
  ment on Twitter is experienced by “a wide range of overlapping 
  groups including domestic abuse victims, sex workers, trans people, 
  queer people, immigrants, medical patients (by their providers), 
  neurodivergent people, and visibly or vocally disabled people.” The 
  net result is that a limited set of subpopulations can continue to 
  easily add data, sharing their thoughts and developing platforms 
  that are inclusive of their worldviews; this systemic pattern in turn 
  worsens diversity and inclusion within Internet-based communica- 
  tion, creating a feedback loop that lessens the impact of data from 
  underrepresented populations. 
  
  Even if populations who feel unwelcome in mainstream sites set 
  up different fora for communication, these may be less likely to be 
  included in training data for language models. Take, for example, 
  older adults in the US and UK. Lazar et al. outline how they both in- 
  dividually and collectively articulate anti-ageist frames specifically 
  through blogging [71], which some older adults prefer over more 
  popular social media sites for discussing sensitive topics [24]. These 
  fora contain rich discussions about what constitutes age discrimi- 
  nation and the impacts thereof. However, a blogging community 
  such as the one described by Lazar et al. is less likely to be found 
  than other blogs that have more incoming and outgoing links. 