J.W.
I think you should. Although it doesn't effect the attitudes of the offenders and probably will stir them up it also sends the message to those that are also sick of the drama that it is okay to stand up for the owner, it is okay to say no more drama.
You will find at first the drama will get worse but going forward when they pull stuff others will defend the owner. You will not be alone. Once the drama queens figure out their behavior is unacceptable to the group they will tone it down a bit.
Right now they are riding high thinking everyone agrees with their behavior, that delusion needs to end.