Not sure how things work elsewhere, but here in Texas if a law enforcement officer asks someone to provide their I.D. and they refuse or provide something invalid, the person is arrested and hauled to jail.
Sheriff Joe’s debupties should have arrested all of the masquerading DOJ folks for refusing to provide proper I.D.
Unless you are driving a car, arrested or the officer has reasonable suspicion - enough to stop and frisk you - that you have or are about to commit a crime, you don’t have to show ID or even give your name.
Otherwise, the *refusal* to give your name when you’re minding your own business in your yard or at the mall or grocery store would be a crime that would allow you to be arrested - and make you a criminal.
While we can all think of reasons - like the need to control illegal immigration - to support giving identification to the police, and it’s probably smart to carry some sort of ID when away from home, we should not be subject to becoming criminals anytime a law enforcement officer asks us our name.
This has been upheld by the Supreme Court in 2004
http://www.cnn.com/2004/LAW/06/24/dorf.police.id/index.html