The main issue is that he's not at the Department of Defense HQ presenting his Department of Defiance ID, claiming to be with the government but intending to present the joke as an excuse if it fails. In this case he wasn't trying to claim to be government to get out of anything so it's pretty obvious that it's a joke.

> 18 U.S. Code § 1028 (4)knowingly possesses an identification document (other than one issued lawfully for the use of the possessor), authentication feature, or a false identification document, with the intent such document or feature be used to defraud the United States;

He wasn't using the fake part of the ID, just his real name, and it's obvious that it wouldn't have done him any good to do so because there's no legal exemption for laser safety officers. It's pretty obvious that there was intent, this was a conscious act, but also that there was not intent to defraud.