The plate readers are not as new as most think. imo
In 2002 maybe, we entered Canada through the tip of Michigan. The Lady, in the booth ask a couple questions but then apparently read off our names and our address. Ask us our plate number on the tuck. I didn't know and got out to try to see. Couldn't get between the fifth wheel and truck. She had to read it from the plate on the Fifth wheel. She said never mind or that's okay and off we went.
Another time coming back with just the pickup with the hitch, which was always left in it, we had a terrible encounter from an US Agent. I thought my wife, was going to cry. I was mad enough, that I was ready to get out and have a few words with him. Wife kept me in the truck. For a long long time afterwards, my wife refused to go back to Canada.
I think we've only been back one time. Went looking for antiques. Didn't know that almost all shops are closed on Mondays.