I don't think it's needed, it is frustrating when get hit by another player because of lag but trust me, racing against ghost cars gets boring very quickly. It just turns into a time trial instead of racing, part of the excitement of racing comes from trying to avoid collision. Ege, if you recall the our most recent Infernus race where you were ahead, I had to stay behind so I didn't crash into you which allowed you to win whereas you were a ghost car I could have driven straight through you and taken your place. Also, crashing is part of racing, if you watch any type of racing at a professional level crashes happen every race even without lag. Now link it back to the game where the racing is done with a keyboard, not as accurate as a wheel, and the fact that everyone isn't a professional. With or without lag crashing is bound to happen.