Guess what, now you're responsible for drugs found in someone else's car. The Associated Press reports: The Supreme Court issued a traffic warning Monday: Beware of whom you ride with. If drugs are found in a vehicle, all occupants can be arrested, the justices said in a unanimous decision. It was a victory for Maryland and 20 other states that argued police frequently find drugs in traffic stops but no one in the vehicle claims them. The court gave officers the go-ahead to arrest everyone. In a small space like a car, an officer could reasonably infer "a common enterprise" among a driver and passengers, the justices ruled.