posted a year ago
"There are a variety of opinions on this subject, as there are various types of immigration checkpoints. Some people feel that any kind of checkpoint infringes personal rights and liberties. In contrast, others believe certain checkpoints (such as those near the border) are necessary to protect the country from illegal immigration.
The legality of immigration checkpoints is something that courts have debated in the past, and it is still an open question. There have been cases where people have challenged the legality of checkpoints on constitutional grounds, and these cases have gone all the way up to the Supreme Court. However, the Supreme Court has not yet issued a definitive ruling on this issue.