There's an XKCD on licence plates (https://xkcd.com/1105/) which is probably relevant to your case, too.
My vehicle blends in and is otherwise-legal — non-compliance encourages me to obey most traffic laws — but I do carry the plate in my passenger seat to display in event of pull-over (my plate is some iteration of "no plate," and I do respect individual officers' safeties [1]).
[1] They have every right to know, when performing a lawful investigation. My plan would be to hold it up while initially stopped (to show intent of identification, my plate is complicated in many ways and must be searched for in a very odd way).
But of course since you cannot even see it anymore it is definitely unscannable. I can drive by speed camera without issue (i.e. no citations received; not that I regularly do, but have tested).
[0] Only once have I been pulled over, in the past decade (back when plate displayed normally), after traveling behind a cop for miles going 100mph+ through Dade County mountains. Cop: "I have no clue what agency you're with — you're plate didn't scan — but you need to slow the fuck down. You're lucky I have somewhere else to be!"
lawful avoidance != non-compliance