Most Helpful Girl
It depends on how nice the cops want to be, honestly. They are fully within their right to I.D. and arrest everyone there who was doing drugs, smoking of any kind, and drinking underage. Sometimes they'll just break up the party, and sometimes they'll only arrest a few. I'm pretty sure as long as you aren't partaking in any of it, they don't really have a case against you, but it's risky. They could still take you in and force you to give names of others there. It really depends on the state, country, and mood of the officers at the time.