Pretty damn disgusting if you ask me. SE should consider adding a housing service entrance to the front of the building that fast tracks to private rooms. to prevent this sort of abuse.

Chances are they just never considered this as a possible outcome, i mean, who would be enough of an asshole to lock out their whole FC from their private rooms, right?

Hope support does something for you OP, this has to count as harrassment and destructive behaviour ruining your own game experience.