"Those who cannot remember the past are condemned to repeat it." (Santayana)
The proposed wall between Mexico and the United States brings to mind memory of another wall, the Berlin wall built in 1961 by the East German Stasi. There is a colorful description of its construction at this link:
https://www.dw.com/en/1961-what-germany-was-like-when-the-berlin-wall-was-built/a-17708563
Less colorful description of reasons for its construction here:
https://history.howstuffworks.com/historical-events/berlin-wall2.htm
Did it ever occur to anyone that a wall could have a dual impact of keeping residents in a society which has gone bad inside, unable to escape intolerable conditions, as well as keeping undesirables out, hence contributing to a concentration camp-like environment? Doesn't the illegal mind control introduce a new factor? Restriction of passage (and information) would be bi-directional.
When I tried to escape to New York in the early stages of my victimization, I found that the perps had the airports covered, and they were able to trick me into delivery to one of their own doctors after I got off the plane at Kennedy Airport. An example of travel restrictions working to corral victims.
Bryan Tew, former government contractor who became a TI, has many videos on YouTube describing his ordeals. He always exhorts targeted individuals to get out of the system while they can, insisting that the situation could worsen until exit becomes impossible. He has traveled to many parts of the globe seeking relief.
