[shetlan]

I believe the term "big whoop" is appropriate here.

Though the transponders are becoming more prevalent, there are still a massive number of cars on the road that don't have them (likely most don't).

Talking down tryout keys on the grounds that they don't work with transponder systems is like talking down traditional lock-picks because they don't work on tubular locks - two different problems solved by two different tools.

None the less, for sniper23's purposes, the tryout keys would provide him with a workable key allowing him to circumvent the need for a locksmith to produce a key from the lock. Incidentally, if the key employs a transponder, a locksmith would be unable to produce a usable duplicate either - he would need to take it to the company for a replacement key (as far as I know).

Returning to the original question:
Producing a fake ID that matching the title and registration would be enough to pass extremely light inspection. Obviously if a police officer chose to check further, he would be able to find a DL photo of the owner - proving that you aren't the owner.

You can get a key for the car far more easily than you can clean it on paper. If you want to "clean" the car, you need to take it out of state, change the vin, and re-register it as a different car.