By the way, there is also at least one US Driver's license issued by the Federal Government that I know of. It's reserved for the members of the Diplomatic Corps and is issued by the Dept. of State OFM (Office of Foreign Missions).
@ Roberto - You are correct, there are several "federal" licenses, I've seen a few (I once had a job cashing checks, so saw a lot of IDs). There are multiple federal licenses (even car license plates - ever seen one from a Native American indian tribe? Military or security agency like the NSA or USMC?) They exist, but most distant bureaucracies typically won't know what to do with them...heck, even "unexpected" facets of your NAME can completely throw off bureaucracies: my wife has no middle name, this causes all kinds of problems in many systems hard-coded to expect something...on her Washington state drivers license, the middle name has an asterisk to represent "none", other systems for banking, and a hundred other things, all fail when they see that. The world depends on millions of independent systems hard-coded for their own needs, and when exchanging information, they often just can not cope with unexpected variations.
Point being, virtually everyone here (from North America) has a state/provincial license. Those states/provinces would ignore some request to deduct "points" that came from Italy. Imagine how the Italian bureaucracy would react if they received some oddball request from, say, the sate of Alabama (or, the Navajo Nation), to add some cryptic message to an Italian citizen's drivers license (I'm quite sure it would be ignored because it doesn't "fit" any known system).
@glenn - If some Italian drivers license form asked me for my DOB, birthplace and phone number, I'd either leave those fields blank or enter nonsense. They are not going to waste time verifying or validating those details -- imagine the Italian civil worker trying to find "Fubar, Texas" or dialing 888-555-1212 trying to reach you...not gonna happen.