Um, FA? It ain't going to work. If there is a market on tis side, and a supply on that side, no fence will ever stop it, no matter the cost.
Not that I am taking sides...but, black-market cigs are pretty easy to find in NYC, you know...cost a lot less then the $70/carton legal ones...
Come to think of it, you can get drugs in prison.
Why is that, you think?
There is a market in stolen cars. Do you leave your doors unlocked and your key in the ignition?
So we should do nothing? I think sponsorship would be more effective and cheaper than a border fence, although the fence is still required.