I'm one of the long-time tenants. While individuals sent from the agency have been wreaking all kinds of havoc, this specific individual has caused ongoing complications by repeatedly vandalizing the laundry room. He and the guy he moved in with have both been gone a long time, but landlords stopped doing repairs because they figured he'd come back.
I agree with what you said- seems the landlords should have the legal right/authority to keep him off the property, but they don't seem to think they can.

