That's the worst request in a while. Lich form isn't self-cast. They can cast it on anything that isn't undead. Basically the only things they can't lich are their own pets, and some select mobs in Kuril.
If they annoy you with relogging buy them a pet, or just kill them.
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If you say plz because it is shorter than please, then I will say no because it is shorter then yes.