There will be no extra rule for this. The suggestion has been declined.
But to clarify the initial topic:
Taming Pens =/= Outposts
We will continue to remove taming pens and we will continue to punish players that violate our rules!
- Old structures must be demolished. This includes abandoned and unneeded structures (for example, rafts, fishing spots & taming boxes) or we will delete them without a warning. Taming boxes, unbuilt rafts, single campfires and storage boxes must be removed after use.