If this is something that horribly bothers/scares you, it may be worth considering looking in to some form of scry protection.
What scares me is perhaps not the spell itself, even if I personally do not like it (which ofc is a non issue).
What scares me is that a feature, that was sole torque to torque before, is opened up by some creative GM.
Not just to include guildmembers themselves, but to anyone in a who-list.
The torque to torque was well thought over and well implemented into the game.
Even the second version of the Torque-quest honored this solution.
It was back then considered, by administration, that seeing NPCs in a who-list, was poor/bad for the game, and the feature was removed.
IMO (obviously) for a good reason. If it is good for a spell, why not put the old feature back, when everyone could see the NPC in the list?
Short answer: Who-list should not be used in such a way.
So what scares me is not perhaps not a single spell like this one.
It is the can of worms that can be opened by adding the who-list into the code of future active spells and specials.
Teleport to Mim. Cast Lightning cloud on Nils. Summon Nazgul on Verminaard.
Not very likely I admit, and possibly nothing to be scared of.
But allowing who-list in such a way. *shudder*
As an explorer, you have done enough to retire.