SE, Please fix this FC exploit

[Veon]

Here is an analogy: If I hire someone to clean my house and give them the key to my house so they can get in while I'm away. I better find all my stuff still there when I get home. Just because they have the key and permission to get into the house, doesn't mean they can become lord and master of the house.

This analogy works for personal housing, because it's personal house. FC housing meant to be shared, and sometime members contribute to buy land.
Do you pay your members to clean FC house? Probably not
Do you have to invite people to FC to give them access to FC house? No