I realize none of these countries are as safe as the US but surely some are safe enough. I agree the flow of people should be left to land owners & ideally,
in such a situation where all land is privately owned, individuals could decide who they want on their land & under what conditions.
However, baring this situation, use of public resources (land, security, economy, institutions, culture) should limited as much as possible to avoid the tragedy of the commons.
