Fer It Or Agin' It?

What do we think about a border fence with Mexico, readers? Once dismissed as a nutty Buchanan initiative, it's now getting serious play. Click the links at this Local Liberty post for strong arguments agin.'
I say the strongest argument against is this: Hugo Chavez at the Mexican border crying, "Mr. President, Tear. Down. This Wall." I promise: if we build it, he will come.