No game has yet to implement a perfect housing system because human civilization is not yet sure how to implement a perfect housing system. The closest thing would be if you paid $$ for your own server (essentially paid for the real world real estate necessary to hold your virtual real estate).

That said, the current system essentially encourages bots and spending time trying to stop the bots at this point is spinning wheels IMO. There are a ton of good ideas in the megathread. We can only hope the product managers are taking notice and interested in feedback from the community.
https://forum.square-enix.com/ffxiv/...ing-Megathread