I'm more concerned about people plating and riding around on their loud-as-$hit dirt bikes; "Hey look dude, I just got my KX500 2-smoker plated!"
Less concerned on how "street legal" they are - more that they're reasonably quiet. Excessive noise is what screws it up for us (motorcyclists). Not so much that you aren't street-equipo-completo. You can always work that out with the LEO that wants to take a closer look
Doubt the neighbors or non-riding public will be bothered that you don't exactly have a to-the-letter equipment-legal bike.
Of course un-muffled Harleys, as always, are the exception