There are many studies about this. As you know this is a universal phenomena, any country have this kind of problems, so there are many studies. If you want some articles I can give you if you wish!
Thank you very much, but none of them doesn't directly related to reverse mobbing / bottom-up mobbing. They are standard research on mobbing. I'm looking for quantitative research on reverse mobbing. For example;
The problem of mobbing and reverse mobbing had been described by numerous authors under two main headings: class struggle and media campaigns. Class struggle is waged with ideological weapons - say, US media scapegoat the Mexican labor, and the "occupy Wall Street" activists vilify the US ruling elites Media campaigns are more multifaceted, but here again Fox is more likely to like Trump at the expense of single mothers and public broadcasting - Bernie S. at the expense of the Bush family.