no rule that allows you to create a no loitering sign and kill people standing on the path outside your base.

But then again, there isn't a rule that doesn't allow you to create one. It states "some form of KOS"
I will discuss with Dcx and Xhantium whether sanction is necessary. It was completely blown out of proportion, and to be fair, it was harassment. The offense fits into the
criteria, as it is minor abuse and this is the only tier that mentions teleportation: