Earlier quoted context omitted.
You may be right. I don't have anywhere near Sunny's problems but I do have a flagged passport after I fought in the militia YPG in Syria (legal, but I seem to have been put on a list which has caused me endless issues with CBP). Alarm bells ring to the Nth degree when I enter, but as far as I can tell they don't have much mechanism to investigate pedestrians leaving. I'm guessing if they do have something it only fo…
You are not currently wanted by the government - and only run into trouble after presenting a passport. This is not how a fugitive on the run would exit (or enter) a country. There is a lot more to the DHS apparatus than simply scanning passports. Most of it is unseen by the public.
Now I know the government must surely have these systems but I think it may be doubtful how effective they've set it up to be to stop people leaving the country if by foot. The flow of people leaving the border in general is just way lower scrutiny, in my experience living in a border state. I would be shocked if the average say non-violent felon fugitive has much trouble leaving if they're not on a flight manifest.