Personally I’ve never experienced someone driving under the influence of drugs or alcohol. But for I sure I know it happens often around to other people. My suggestion to prevent people from doing it is to have the person that’s sober drive. Or if everyone is under the influence order a cab or Uber, anything but have someone under the influence drive. It’s very dangerous drive if your not sober. You can cause a car accident if your drunk or high that’s why you shouldn’t drive while drunk or high.