My son has seen it happen on his high school. The victims proudly proclaim to be weaponized autists. They have an outlook on life that funnels them into an incel lifestyle. If you’ve seen the Netflix series “Adolescence“ you’ll recognize that it’s downright frightening.
I've had that recommended to me before and it's not surprising. I was in that group myself at that age but the internet was a much nicer space. I'd break into computer systems (including USG) for the lulz. I'd get weirdos attempt grooming and hit them either with deletion scripts (deleting autoexec.bat and some key Windows files) or go full Back Orafice on them). I would take down the porn sites which kept spamming my gaming / book newsgroups.
Now those groups have been weaponised. It started on 4chan / SomethingAwful - at that time Americans were so obnoxious that we simple banned them from our gaming servers - where the ARGs were tested out and perfected. Then it was pivoted to Facebook, Youtube, Twitter and the other socials and perfected.
We should have saw this coming. I even thought to myself back then: "it's just as well that the internet was just a nerds thing because this could change society if it was used to control the great unwashed".
It looks like the evil people were also paying attention.
Talk to your kids, people.