I think that's a contradiction. If God is omnipresent, and exists in all places and facets of actuality, then he must also exist in Hell. But if Hell is a place of pure evil, and no good can exist there, then how can God be there? And if God is Holy and Pure, and Hell is the absense of God, then how can God exist in Hell at all ?
And if God does not exist in Hell, then how is he omnipresent ?
The only way God can be omnipresent is if he/she is everything and everywhere. If God was good and evil, then God could occupy Hell as well as everything else.
However, if Gods consciousness transcends your conceptions of time and space, he doesn't have to physically be there to be there. I don't know how to explain that...but everything is "one eternal now"* with God.
He also doesn't have to be recognized. God's presense can be felt anywhere but can also be ignored anywhere, which is why evil exists despite God being there.
nothing is omnipresent. other than SEEING everything, one would have to FEAL everything from every possible perspective at the same time too. {and this is impossible as many things, to maintain thair uniqueness in perspective, need to be felt seperately from other perspectives. e.g. you can not feal true dispair in a certain situation if you are also looking at it from a hopeful perspective simultaneously}. this applies more easily to people's thoughts, even if you were able to sumhow SEE or FEAL sum1 else's thoughts, your experience of them wud be different than the expirience of the actual person, simply because, you are not in the same state he/she is and feal differently about the thought {based on your own state of being} than they do. this subjective facet of reality in my oppinion destroys the omnipresence paradigm. which also explaines why the god of scriptures doesnt have empathy for each and every individual soul's view. simply because those are things no1 can truly know all at the same time as they contradict each other and destroy unity of an entity.