I had my GTi for 14 years and never really been hassled except for being followed till my car checked out on their computer..
Years ago i had a front sticker as a number plate cos i had a different spoiler then,it was exact size,reflective and even had black spots to look like screws.
Got pulled over and was asked to remove and replace it and let me go.how the hell did he notice as he was going the other way.Asked him and said "i know your car"
I got rid of it and 2weeks later pulled over again by another just to check,and let me go...
Couple of years ago outside work one night pulled over again and got a defect only.
First thing was an oil leak which was minor to me but not him,small amount of oil under dizzy from O ring.. Fixed
Second was the roll cage and why i didnt have a eng certificate for it.Told him its in for a couple of weeks cos going to car show.
Just had half the cage in,not the front... Fixed
Finally left rear tyre,which had more meat than right rear..
Blue slip done and that was that,nothing major just an inconvenience
Sorry for the poor pic