>"Wouldn't social desirability bias predict that people would be reluctant to support Mangione's actions in any way which might be traced back to them personall

>"Wouldn't social desirability bias predict that people would be reluctant to support Mangione's actions in any way which might be traced back to them personally?" I think you inadvertently answered your question with the preceding question to this one. Because it's harder to trace back a lot (not all) of individuals from their online identities to personal identities, they're probably more willing to show support for Mangione there, than in places that trace back to them directly. Who are "touch grass" people? What are you talking about?