Mathematically speaking, yes. If no one is buying any of those hundred books than effectively those hundred books are the equivalent of an infinite source since they will never run out.
To everyone on Mateus, I'm super sorry that you showed up to a previously dead server where people had decided to buy a whole ward for their personal decoration enjoyment. If only you had decided to transfer sooner (like those 2 did) instead of waiting for a free transfer to leave Balmung in hopes of getting a nice home of your own.
To everyone on Gilgamesh who has to compete with Mew and whatever other FC, I'm super impressed that these FCs were able to purchase so many plots considering the server size, especially if Mew really did acquire all of their extra houses after 4.2. To be able to accomplish such a feat on such a highly populated server is quite an accomplishment. It really does suck that our limited housing is impacted by it, but I still have to be impressed by what they've done.
To people on all the servers that I've missed (I know Leviathan used to have an FC with quite a few houses and still might, I haven't heard about them in a few years now), I'm sorry that our limited housing in game is impacted by what a very few people/ FCs have done; however, as a whole multiple house owners, even considering the extreme examples on Mateus and Gilgamesh, should only account for about 5-6% of the housing on a server. That's adding in a lot of extras. (That means only 5 or 6 of those 100 books are the people you complain about. Please stop trying to make them seem like the devil, as most of the houses on any server are owned by single house owners.)
Pretty sure that kicking everyone out of your FC for no reason is considered griefing and a reportable offense. I know for a fact it's griefing and reportable if you kick everyone to sell your FC. The part about doing it just to steal from everyone is what might make it a grey area in the rules of the game.
Flip side of that is my personal experience. I was an officer in an FC. I donated 35 mil to the FC chest to help the FC be able to buy a mansion when Shirogane came out. FC changed leaders. I didn't like the new leader, at all. And I didn't realize until about an hour before I left the FC (after a few months of putting up with tons of toxicity) that the new leader had changed permissions for the FC chest, so even though I was an officer and "trusted" I would not be able to get any of the gil back that I had put in the chest (under the old FC leader back when I had faith in the FC) to help the new FC I'd be joining. It sucked. But sometimes set backs happen in life. And I had no one to blame but myself for putting my faith in a group of people I new from a game. The real kicker is the new FC leader eventually kicked everyone out of the FC and "gave it" to a "irl friend" of hers (that she had/ has never played with in game before or since). Funny how she seemed to have tons of gil after she "gave away" the FC and the house.