It would be nice for people who drive like idiots to see a huge Dodge grill in their rearview with lights, that would really throw the salt in the wounds because they weren't expecting a Dodge on their tail in the first place.
Ford hasn't modified the CV's design for ages and it doesn't seem like they're going to change that anytime soon either. It would surely be nice if various law enforcement agencies switched to Chrysler or GM cars, but with familiarity comes comfort. G8 GT CHP cars would look sick in my mind, hopefully we'll see something like that one day.