Is that true? Can you post some studies you saw? That's fascinating if true. "The dickheads" post more - because they find an environment to take out their evil desires where they believe there are "no consequences", sounds like it makes sense. But I'd like to see the evidence.
It might have been "The Distorting Prism of Social Media: How Self-Selection and Exposure to Incivility Fuel Online Comment Toxicity" by Jin Woo Kim et al. [1][2]
1: https://academic.oup.com/joc/article-abstract/71/6/922/63636...
2: https://drive.google.com/file/d/1rJ20sca3fg6epXwVbGj7HdNfCH4...