Do you have a picture of dark matter? Do you have a picture of EMF? They exist too.
You noticed that dark matter is still a hypothesis, not a theory. There is no known evidence toward it, so we do not call them theory. They are just hypothesis that is filling the gap for now. They can be replaced with other hypotheses that are being supported with evidence.
About EMF, we can perform repeatable experiments with them. So we do have evidence supporting EMF.
I answered these, but how is this related to what I was asking? I was asking how do you know that NASA guards are taking phones when you reach the
edge. So what I conclude from your response is that you don't have any evidence to support your hypothesis of NASA guards taking phone at the edge.