I got pulled over for it twice. Its been on my car ever since. Just get over it, mount it on the car and bring pictures to court with you. You'll be out of there in no time.
You dont want to give cops an excuse to pull you over. Thats why mine is on the car.
+1. Not really worth it to play games and getting pulled over sucks, especially for such a trivial thing. Screw the front plate in and forget about it.
Having a plate in your window looks 100x worse than having a front plate in the proper position.