If they shutdown their operations today, that would be incredibly detrimental to existing users. what if I held an option expiring this week? Am I forced to let

If they shutdown their operations today, that would be incredibly detrimental to existing users. what if I held an option expiring this week? Am I forced to let it expire because the SEC forced them to shutdown? Seems like a douchebag move. sensible thing would be to remove margin from all accounts. if you want to prevent anymore transactions, at least give people some heads up so they can liquidate time-sensitive positions.