No, the crime is that you do not believe that leprechauns exist there being no evidence for their existence, yet you believe in a God for who there is an equal quantity of evidence of his existence.
There is no crime. My experience of leprechauns is that everyone laughed at them they were an object of ridicule so, relying on cultural references I laughed at them as well so the possibility of believing in them has never arisen. In the event of having to discuss Leprechaun's because of faddism amongst the giggling atheists. One defends one's unbelief in them by saying that because of physical description
Leprechauns are the very thing that should be empirically apparent yet aren't and that too is based on the cultural lack of viable reports. I do not go doing my own research on them because to me they are 'An Irish affair'.
God on the other hand is a completely different affair and the impact of God crops up in all sorts of places. I find God more affecting than other lesser mysteries because, they are, ultimately not Ultimate.