You can check up on others and ask what they’re doing. Keep an eye out for suspicious activity and if you feel like someone is in danger, intervene by making responsible choices, depending on how severe the situation is. The benefit of looking out for others safety is also making sure of your own so always be aware of your surroundings.
if they fall, they fall. there's nothing you can do to save them from themselves. Once they are a certain way, and you realize what they're doing is wrong, it's already too late, it's coded into their brain like a computer, you may think that they have changed, but they only change their personality around you... there is no way to change those around you, without force.