I find that the main fault lies with the social network that does not control and does not eliminate those who generate such challenges that are beyond logic.
As far as I know, steps have bees taken to avoid such tragic events to happen, but I wouldn't hold my breath. There's always someone who comes up with a new idea to circumvent rules and regulations.
Children are not to blame.
No, but they are the victims unfortunately and this is getting worse day by day.