MANKRIK
Grandmaster
Create an option when designing a house to add certain house defences that will attack anyone who is not friended to a house, e.g. mines, tripwires, statues that shoot arrows/throw explosives (inside the house only). There would need to be a limit so you can't just put them on every tile - the larger the house, the more traps you can have. For some of them you would need the traps to work in combination, for example a motion sensor to reveal a stealthed player in order for a statue to target him (think Dungeon Keeper 2). It'll make it interesting for house thieves, and players can organise competitions where thieves have to bypass security systems in order steal a certain object from a house.