I don't know if anyone's mentioned herd mentality. There are a lot of studies. I was catching up on the thread and just wanted to interject before I forgetI find it fascinating too, would love to see some kind of study on this behaviour. I guess it’s about being part of something and the attention that comes with it and then you have the people that want to fight against authority this is the only way they can do it. I’ve noticed you get people that have had involvement from authorities and maybe feel let down by them or angry towards them.
Social media gives them an easily accessible outlet.