I have never understood why folks would blur a tag number when posting on the internet. If you drive down the road the number is there for the world to see which could be tens of cars a day or thousands.
I don't know how someone can trace your screen name to you. Of course Im just a guy who is computer dumb
If you drive around urban areas, your tag is scanned multiple times a day by the government. If the area is set up for it, local LEOs will get a notification, along with the information and a picture, that this stolen tag was just seen in this area, for instance.