I don't think regular patterns are enough to trigger it. After all, many people regularly commute to work or school or some combination. I'm guessing that these

I don't think regular patterns are enough to trigger it. After all, many people regularly commute to work or school or some combination. I'm guessing that these trips were to places near the border where it's easy to smuggle drugs into the country. They may be to a place in the middle of nowhere. A college is a bustling place with plenty of kids coming and going, especially on weekends. You might be disappointed to learn just how commonplace you are. :-)