Originally Posted by essxjay

You said: "I am thinking about the people who dont get warned and end up in a very odd confrontation with TSA." I understand your concern for others but the consequences of tourist-TSA conflicts are out of your control.

TSA has no responsibility or authorization to act on behalf of pax w/Immigration.

Also not the responsibility of the TSA, ICE, CBP or any other alphabet agency of the USA.

Please see Post #3. Whether you choose to believe it is up to you but your belief won't change the validity of the answer.