i highly doubt any cop in any jurisdiction would consider it impersonating PO, but improper use could land you with some hefty charges... additionally depending on your location, there is most likely laws pertaining to where you can have lights on your vehicle... i know where i just moved from, you may not have more than 4 additional lights (i forget if it is in addition to headlights, or stock lights) they must be switched in pairs, and wired to work 2 as fog, which work only with low beam, and/or 2 as driving lamps, to work only with high beam, with a total of 4 lights max on at any time, may not be mounted higher than the center line of the stock headlights, with an additional maximum and minimum height from the ground (lifted/lowered vehicles) and all must face forward...
that being said, where i lived, it was absolutely NOT enforced at all, there are trucks running around with 20 or so lights all the way around their roof racks, and it would never even be mentioned...