Use the backseats in cars for 2 doors.

So basically the idea is to add a function to the backseats of 2-door vehicles. Where you can go into the back seats by going into the passenger and using the Vehicle Controls to get into the back seat, this adds realism and allows other people to get in the car which has room for others.

The downside of having a cage or having the backseats removed would disallow people to get in so it's more realistic.

Honestly, it would be nice to see this added to the server.