If it were me, I'd be afraid the security agent would chose to be a dick and put me in jail for 24 hours for whatever motive he could think of. Also, the fake ID thing is pretty risky.
Well, I was once interrogated in a very unpleasant tone by a police officer at the airport of London Heathrow because I was carrying an empty baby buggy, since I was picking up my wife and our son from a trip. Basically I was suspected of attempting to kidnap a child, so now I try to make my encounters with police officers as short as possible.
It's generally illegal to impersonate an police officer, or other government official. Laser Safety Officer is a stretch, but consider Food Safety Officer ("I taste everything that comes out of the kitchen!"). This is where those fuzzy "reasonable person" tests start showing up, much to HN's dismay, where every legal problem should be decidable by a python script.
The government employs a great many safety officers. I doubt many people know all of them. A "reasonable person" may conclude, upon presentation of a "Laser Safety Officer" ID, that you are there on official business.
Depends on context. It's not illegal merely to carry such an ID. It's probably not illegal to give one to a Secret Service agent, either, unless you're trying to deceive them, but that's likely skirting close to the edge.
"Certified Laser Safety Officer" from the Board of Laser Safety ("It should be emphasized that a certificate awarded by the BLS does not constitute a license to practice, nor does it guarantee that a CLSO meets any federal, state or other requirements related to the practice of laser safety.") - http://www.lasersafety.org/uploads/pdf/clso_pp_manual.pdf .
In other words, a 'Certified Laser Safety Officer' is not a government-specific designation.