What can I do to stop this?

[HoodRat]

Your friends are hungry and have no way to get home.

And then they magically teleport home half an hour before the person who drove off gets there because that's what it's like when you leave a dungeon after someone else already has. Or someone randomly throws open their car door to let them in and continue on with the night shortly after they are kicked out of the first car. Your analogy is terrible for leaving a dungeon in df.

You agree to help people and turn your back on them when it inconveniences you. There's no arguing your way out of that.

I don't remember signing a contract stating that every time I use df, I'm there to help/carry people.