I cross into Canada by car fairly regularly. I have noticed US Customs more and more stopping motorists to ask questions why they are LEAVING the USA.
police-state in the making. What’s next is a new big wall.
I got stopped leaving the US via the tunnel between DTW and Windsor, probably 5 or so years ago. No booth or regular checkpoint, jut a couple agents in the tunnel entry road, one with a rifle, motioned for me to stop. I was questioned and made to open the trunk. No request for ID or anything else.