Your argument is a complete non sequitur, because these people did not suffer "misfortune". That implies they were innocent victims of something beyond their control. When in fact they willfully chose to ignore everyone who warned against joining a pyramid scheme, in the hopes they could get something for nothing.
No one is "revelling" in anyone's loss. But sorry, when people get burned for being greedy/stupid others WILL be amused, to varying degrees.
I do hope that the instigators are caught and punished, fwiw. Good luck to those trying to remover at least their "investment".