The Border Fence is simply ugly and terrible and will have no positive effects at all. Smart Borders has a great write up on this.
The wall has millions of detractors with very valid reasons, from my students whose heritage and extended family would be affronted by such a wall to outspoken advocates for the endangered species huddling in these last remaining stands of a lost ecosystem. The federal government and a few outspoken, if misinformed, syndicated talk-show hosts keep lauding the wall as an answer to everything from immigration to terrorism and drug smuggling. They do not let the facts get in the way, nor their own statements about the wall being a $50 billion deterrent rather than a panacea.
Story on New York Times:
A Natural Treasure That May End Up Without a Country – New York Times
By DAN BARRY
Published: April 7, 2008
The Sabal Palm Audubon Center in Brownsville, Tex., home to rare birds and other wildlife, may end up on the Mexico side of a planned border fence.