I'm on official, is this idea is against the ToS?

[darthphysicist]

You won’t get an official reply. Your guide to acceptability is here:

Land Claim Abuse on Official Servers

The flexibility of the building system in Conan Exiles can allow for many different building strategies. Not all of them are conducive to fair play on the Funcom Official Servers. One aspect that can be abused is the claim system. Below are examples of building strategies that should be avoided by players when playing on Official Servers. Private servers may or may not allow some of these strategies and building styles. Funcom Customer Support does act when buildings like the ones you see belo…

It is a “guide” as to what would be unacceptable, but is not intended to be comprehensive.