So I really thought "Passive Mode" would help stay clear of random jerks looking to troll people online, however, I feel it doesn't serve any purpose.
I mean in a game where you spend almost 90% of your time in a vehicle, it doesn't really add anything to the game.
Passive Mode only makes you untargetable while walking. You are still able get run over by a car though. However, other players can target you while you are seated in the car even with "Passive Mode" enabled.
The last point is a really poor decision. What is the use of having this option in the game in the first place, if it serves no purpose. I mean who spends their time walking around?