what bad behavior? providing a 6mo heads up that you don't need to come back is pretty reasonable. while you are at criticizing these companies, do know that a lot of smaller companies are requiring their employees to come to work in lots of places.
How is not bringing people into the office negligent? That's again the comment you are responding to - a company that sounds like they are trying to get back ASAP but only when it can be done safely, hence the month to month updates.