Window tint or those shade things that stick to the windows is about the only thing you can do. I hate those shade things because I often try to look out those windows if I'm not driving and I see something interesting but they block my view. Wife put them on the side windows in the back since we have our granddaughter sometimes in the car.
You're probably better off having those car-seat/infant carriers that lock into a base that stays in the car. Someone would have to get up next to the car and look in to be able to see the base since it is much lower than the window. Still can't do anything about it when the kid is in it though.
Can't do a whole lot about installed car seats, though.
Window tint or those shade things that stick to the windows is about the only thing you can do. I hate those shade things because I often try to look out those windows if I'm not driving and I see something interesting but they block my view. Wife put them on the side windows in the back since we have our granddaughter sometimes in the car.
You're probably better off having those car-seat/infant carriers that lock into a base that stays in the car. Someone would have to get up next to the car and look in to be able to see the base since it is much lower than the window. Still can't do anything about it when the kid is in it though.