Did People Tint Windows in mid - late 70s?

I never really noticed any in the 70's , but Im in the same age group as Dorian. Early 80's is when I can remember it being popular, and remember looking at some cars that just got it done and a week later its off....bored cops!! It was almost a game to see who could tint their windows and have it on the longest. I grew up in the town where the cops were put to pasture (came to retire and get fat). Tim Hortons was put in right across the road from the cop shop.