I grew up near the Canadian border. When I left for SV 7 years ago, you never saw border patrol outside of the border crossings. When I came back last year, I saw their patrol cars roll by every couple of days. That may not sound like a lot, but I live in a small town in the middle of nowhere. I see them more than I see the local cops.

I also heard they put surveillance cameras and licence plate readers all over Massena[0]. There's nothing there. College kids roll through it all the time to go to Cornwall to drink. That's about it.

[0]: http://www.newzjunky.com/news/0601massena_cameras.htm