The coast guard has seized several submarines full of cocaine. If it was easy to control your borders why do we have drugs on our streets? Here is how capitalism works. If something is needed, someone will find a way to make a profit providing it. The coyotes, cartels etc. have a lot of capital to play with and it will not be simple, easy or cost effective to stop them. If you want people to stop coming into your country to get free stuff, maybe you should stop giving them free stuff.
I’m not giving them anything.
Part of the problem is that there are almost infinite options, and infinite patrols are simply not possible. The profit side of the balance sheet controls who has what opportunity, and the cartels have much to gain, and incredible resources, courtesy of the US making it relatively easy to smuggle stuff in here.
This will become a matter of national (military) security in short order, if it isn't already.
If you want to be able to screen entry, you need choke points. A wall gives you that.
If you want people to stop coming into your country to get free stuff, maybe you should stop giving them free stuff.
I fully agree. Reducing incentive to be here (aside from becoming American) would help.
Making it harder to get across will reduce the number of people invading. Historically, it is far more effective than doing nothing.