Unchecked groups like you describe and large part of reason why so many people checked out first time they could. The in person contact they were forced into was not helping them or was actively harming them. People escaped - by leaving those bullies and going elsewhere. It is, frankly, ridiculous to claim that those people found "crowd to cheer them". They either found better healthy place of were lonely. You are describing a playground full of bullies and frankly parents who enabled it are equal assholes.
Following may sound like bad faith, but I 100% mean it. Now, former bullies complain they are lonely as others used the option to leave. Those others may be lonely too, but they are still better off then being degraded.
> Voiceless people must find their voice. The responsibility is their's. The crowd will not come to the rescue of the person who won't stand up for themselves and make their way in life.
Bullies are responsible for bullying. Punishing bullies is necessary part of the solution. The responsibility is not just on victims. And if you push the responsibility on victim, stop complaining that the victim left.