Originally Posted by
viking407rob
They HAVE denied entry to quite a few people with legal status. Even if you are the holder of a VALID visa they can still deny your entry. This can even be done on a "Hunch" that you plan to overstay your visa. A close friend of mine had their valid visa revoked and was removed because they traveled into the US with an open return ticket. No harm meant, this person was backpacking and just trying to leave their options open. Quite frankly, anyone who was wanting to stay would just book a definite return and "forget" to show up at the airport that day. It shows the arrogance of our sworn "defenders" when they assume everyone traveling into the US is doing so to migrate. I have even heard of non-citizen legal residents being detained and removed by USCIS. With all the insane, one-sided and hypocritical immigration laws, the last thing we need are glorified security guards (who may or may not be influenced by their personal political views) enforcing said laws.
A valid visa will permit you to enter the US but it doesn't give you the right to enter.
The burden of proof is on the traveler, not the officer.
Non-citizen residents are subject to removal for a number of things: possession of illegal narcotics, felonies, being out of the US too long without proper notification, etc.