Trapped in my fc.

[Nestama]

To punish him for it as a ToS violation, they'd probably also have to know that it was done deliberately.

They don't really need to punish them, but rather suggest they open the house up and allow OP to demolish their room so they can freely leave the FC. Granted the GM's would have to keep an eye on {Player} for X amount of days until they log in (unless they can move logged out characters into the Gaol).

That said, Johnmark said in the OP that the new leader kicked every other member out of the FC, except for him. Even if you have a Private Room in the house, you can still be kicked by the leader (unless this has changed). Heck, the other three members in the FC, two of which are only level 1 and 3, are at a higher rank than Johnmark.