Yes, I was pulled over recently because a red Defender was stolen locally (mine is orange), I had just gone through one of them Anpr mobile vans and it was an un marked BMW that chased and stopped me. He said my rear plate flagged up as a 'concern' but didn't know why, after a discussion we decided it was my light guard upsetting the camera so decided to investigate.
I was quite pleased at their actions and told them so.
I also make a cup of tea for the guy who parks the speed camera van outside my house, 30mph limit outside a school.
His record is 83mph...