They had this in MA and I fucking hated it. The worst part was lots of old style plates only came in sets of 1, so they were exempt from the rule and were not ticketed for lacking one in the front. They weren't issued a 2nd plate or forced to replace them with new plates, so basically the law didn't pertain to them. What kind of BS is that? Something like that should be all or nothing if the official story is that it's all for crime prevention.
As for me, I had one on my daily driver back in MA but never on my Mustang. I averaged getting a ticket for it ($50) once per year. Sure it adds up over time, but it didn't bother me. I'd rather have done that than put holes in my bumper and stick an ugly-ass plate on my baby. In MA, they had annual safety/emissions testing and a window sticker that was easily identifiable as outdated from cops on the side/other side of the road. I'd get pulled over for an old/no sticker more often than the plate, though they'd often just write me up for the plate since it was a simpler offence and the costs were similar.
Funny thing is my Mustang would pass emissions easily but "by the book" it should be failed because the exhaust was "modified from OEM". Yes, even with cats and if I'd pass the sniffer tests, the tech could fail you at his behest if he knew the exhaust was modified. That's just the beginning of the BS you had to put up with. All in all it wasn't worth my trouble nor time, and again I was rarely pulled over. Considering the costs for the stickers and the time involved to go get one, paying the ticket once per year on average was far easier for me to accept.
I hope THAT shit doesn't come to MI now or ever, too...