I am not sure what this is supposed to be, some sort of joke or some sort of anti-immigration scare-mongering tactic. Getting inside the U.S. is the easy part.

I am not sure what this is supposed to be, some sort of joke or some sort of anti-immigration scare-mongering tactic. Getting inside the U.S. is the easy part. Renting/buying property, setting up bank accounts, getting a driver's license, getting a job/gainful employment/a career, etc. etc. etc. These are the types of barriers that prevent overstays. Only the most desperate are willing to put up with all the risks and limitations that come from being an illegal immigrant in the U.S., and the most desperate will always find a way to get into the country despite whatever crazy oppressive borders you establish.