what you apparently had was a less than bright trooper. see ron (and this comes from one who spent more than $55 on license plate covers which were designed to put stars in the lenses of those red light cameras and was as the result stopped about 4 times until they were removed) about 2 years ago they amended the license plate cover section of the code-which was previously intended to cover instances of obscuring the plates- to include covers intended to foil the red light cameras. i figure the trooper assumed that was the intent and effect of your covers. but hey, a good lawyer MAY be able to get you off (of course, a good lawyer ain't goen to traffic court for no $55!!).

you should consider fighting it yourself, i can get you a copy of the statute if you want one.