> That's the intention but unless they brought all their family over they'd probably find a need to leave at some point. No, they won't. If the overstay was on

> That's the intention but unless they brought all their family over they'd probably find a need to leave at some point. No, they won't. If the overstay was on purpose, you can bet they are not leaving no matter what. > So preventing re-entry is a plausible cause. Which is something that's already done. When you leave, the airline reports that information(if by plane, no idea about other methods). It is a flawed system, but skewed against the individuals, as the airline may fail to report (not sure how often this happens). I was actually scared the first time I left the US, because there was no exit stamp. I had only been to countries which stamp your passport when you leave. If you are using the system for this purpose, you're using it to replace a cheap stamp, plus human verification.