How to perceive the fully cloaked master of the universe

[Purple Rabbit]

From Wikipedia: "The argument from ignorance, also known as argumentum ad ignorantiam ("appeal to ignorance"), argument by lack of imagination, or negative evidence, is a logical fallacy in which it is claimed that a premise is true only because it has not been proven false, or is false only because it has not been proven true."

So unless such a person claims that they must be right about God because they haven't been proven wrong, or that others must be wrong about God for not proving themselves right... then I guess they aren't falling into it? Unless I'm missing some implication from in your above post?

They are exactly doing that when they claim to know for absolute anything particular about a god (a true premisse) and at the same time deny any perceivable properties of such entity, because the latter implies that it will always be unproven.

If they do not claim it absolute, but assume it on faith only, I really see no difference with fantasizing about goblins in my backyard.