The stupidest question that I have ever heard about the Holy Ghost is from the person who knows from scripture that it is real and available, yet with hard and stubborn heart ask, "Do I have to have it to be saved?" "Will I be lost if I don't get it?" "Do you mean to tell me that I will go to hell if I don't get it?"
With something as great as the Holy Ghost, why does the question have to be, "Will I go to hell without it?" Whether or not a person has to have it to be saved should have no bearing on them wanting it. If it is a gift from God, why would you not want it? This question is like offering someone a rib eye that is grilled to perfection and them asking, "Will I starve to death if I don't eat it?"
"Oh, taste and see that the LORD is good! Blessed is the man who takes refuge in him!" Psalms 34:8 ESV