Of course those "secret police" cars are always a dead giveaway.
Ford Crown-Victorias and before that it used to be the Chevrolet Caprice (before the blockheads at Chevrolet decided to discontinue them). Who else drives those damned beasts?
Now if the undercovers were tooling around in little Zastavas (Yugos) or Chevrolet Altos (two cool little cars you can't get here in USA
)....we'd have something going here.
Then again...considering the trends here in the USA, if they want to blend in, they'll have to pull out the big 4x4 trucks!!!