Is the Ring of Salt in the Ground Safe?

How high up off the ground can you get before the protection is no longer effective? If i put a big ring of salt down and then fly up in a helicopter, are the ghosts going to get me? Or does produce a sort of anti ghost cylinder that extends all the way up to the stratosphere? That's bem ruminating about revinence in richmond an. Ah, this is stilla. You wan do yo. Maybe i want to help you. Always got a ring of salt with yuin this lu and jus tha. Salted belts, you can wear rum salt. Salted suit. Is it a circular oh, jerkieso, this raises