Dear "Build the Wall" people: About your dumb idea...

To enter the US illegally one needs a guide, transportation and a chunk of money.

The money is not trivial but it's within the means of millions of would-be US residents who are well heeled or are willing to sell all they have. (https://adnamerica.com/.../coyotes-now-guiding-higher...). Cash problem: Solved.

Let's assume for a moment that the average illegal immigrant weighs less than 300 lbs. Transportation is not a problem if you have a friend with the right equipment. (E.g., https://www.rmus.com/prod.../rmus-heavy-duty-police-drone...). A "coyote" could recoup his investment with the fourth successful hop over the border. The migrant would no doubt be scared witless for a few moments, but who cares after all? Transport problem: Solved.

As for the guide, with the simple GPS controls inherent in the mini-copter a migrant could be airlifted at night to any destination within a few miles of the border and whisked away in a waiting car.

If I, who am not interested except as a thought exercise, have thought of it, surely some coyote is already experimenting.

Let's consider who else built "the wall." The first who comes to mind is Maginot, who persuaded France that a row of artillery platforms along the borders with Alsace-Lorraine and Luxembourg would keep the Germans out. Do a web search to learn the result.

Next comes a certain A. Hitler, a strategic thinker much admired by the current wall-builder in chief. AH built his wall along the Atlantic coast of France, comfortable that no one could invade across the English Channel.

Side note: Walls are nothing new. Hadrian built one to keep the Scots out about 1700 years ago. However, since 1762, nine Scots have risen to prime minister in the British government. Works pretty well.