I sort of got the legal aspects, it is basically to me, the state putting up a unfair double standard because it suits their needs.
Of course, how is a demon suppose to get drunk, it’s not like you see people with demon wings and horns at the bar or waiting on line at the DMV for that matter, they use our bodies. You’ve seen TV and movies and the like with a angel figure on one shoulder and a demon or devil on the other, and the person decides which one to follow. The part left out is that whatever one the person chooses (the angel or demon) becomes ‘one’ with that person for that choice. That person and angel act together as one, or that person and that demon act together as one.
The penalty for getting a DWI, or a bar fight only has to be born by one, as the demon + person are one in that action, so only one has to pay the penalty. So the person gets hurt and the demon has his ‘fun’ safely. This is the nature of demonic possession and why demons desire to possess a body and why it is so evil.