If we’re looking for a 30 ft physical barrier, then simply build them 40 ft tall and bury them 10 feet deep in rebar reinforced concrete slabs.

Cheap and easy. If each section is 20 ft wide, just butt the slabs up against each other. Dig your tunnel under that, hombre.
With our drones aloft and the surveillance cameras on site, you better be a gddamn vole to make it through before someone with a”deterrent” shows up to show you the errors of your way.

Get in line. Come in the right way. You aren’t special. No more special than the guy in Latvia that’s been waiting 7 years.

No one else wants to leg sweep the guy that walks in front of the line at the quickie-mart? Why should we tolerate this crap?