Did People Tint Windows in mid - late 70s?

Wreckers here in Fl seem to have a 'papal dispensation' when it comes to dark tint.
I should know. My boss had limo in both our roll-backs plus a band across the windshield. Every time I met a cop, they just waved.
The downside was backing up at night as you had to run the windows down. The clearence lights on the bed looked like candles about 100 feet away. But it sure was cool in the truck when it was 100 outside.