Not, IMHO, a very good idea....
Here in OH, we must notify IMMEDIATELY if carrying, but "immediately" is not defined, and a lot of LEO's don't know about the "if carrying" part....
At one time, the MDT would show a nasty note to the effect of "We're all going to DIE!" and while the Officer would quickly get the word as to what it actually meant, the Dispatcher often had to manually scroll for it. The thing that worried most of us is that the Dispatcher may be a little too sharp in dispatching backup, and a little too slow (or not quite obvious enough) with the Cancel....
AFAIK, this has been fixed. DL's ARE tied to the CHL's, though....
If you're the registered owner of the vehicle, your plates will refer back to your DL and CHL.... Somebody else's vehicle and they have to run your DL....
At one time, a lot of OH guys were registering their vehicles to their non-CHL wives, etc., or to a business. Perfectly legal....
What's insanely funny about this, although the Officer knowing that you may be carrying might add some comfort to his approach, is that the guys they need to worry about don't need to notify, and may not show up on the MDT....
And a story.... Mom sort if inherited Dad's Caddy.... She really was the primary driver, but he picked it out before he passed on. One morning she went out to go to the hairdresser's and the display on the dash lit up with a similar "YOU'RE ALL GOING TO DIE!" message. She called the dealership and they sent out a flatbed and took the car to the dealership - about twenty miles south of here.
Turned out to be a sick battery.... I drive it now - she's 95 and too infirm to get in and out of it without help. I still get amazed by some of the messages that pop up. Ever have a car tell you that the gas cap wasn't on tight enough?
(My car's now telling me that I have a battery problem. A couple of secondary meters and some in-depth testing say no.... It's making me nuts, but at least it's just an idiot light thing. Computers, bah.... It appears that whatever's telling the computer that there's a problem with the battery has a problem....
)
Anyway, and back to topic, no.... A "Steal Me" sign is always a bad idea....
Regards,