While I don't agree with Mew and other people that do this and act with abhorrent behavior, blame SE on this. It's even in their own information put out by SE that people prior to a certain patch number wouldn't be affected, and stacking that on top of how people are getting around it - yep, blame the developer for this.

Then they say that housing can't really be expanded because of resources. That is due to lack of resource management by allowing this to take place. Don't hate the players, hate the game.

* These conditions only apply to purchases made after the release of patch 4.2. Any land purchased before patch 4.2 will be unaffected, and no land or estates will be lost as a result of these changes.
https://na.finalfantasyxiv.com/lodes.../housing_land/