While I got the humor regarding Canada, we are talking about the Mexican border. I don't know if you have ever been to the border, but a 5 mile DMZ as you propose would totally eliminate not only the Rio Grande Valley, and all the food we grow there, but also several fairly major US Cities. There's a metric shitload of private property -owned by Americans - that is contained within that 5 miles.
There you go, introducing reality into a discussion about the border!
Didn't anyone ever tell that the entire 2,000 mile border is nothing but flat dusty desert, with a little muddy water trickling through? And that no one ever crosses it for any reason except to steal jobs and welfare from Americans while smuggling cocaine disguised as Kindergarten snack packs?
Speaking of Canada, this past Friday/Saturday/Sunday, they were set up on I-93, between exits 29 and 30, roughly in the center of this map:
http://goo.gl/maps/Av0l
Zoom out until you can see Canada. You might notice it's a good ways, certainly pushing the 100 mile limit. And that's only "as the crow flies"; driving, it's about 150 miles to the closest border crossing.
But thank goodness that we finally have equal opportunity jackbooted thuggery.
