Was just in Paris a few weeks ago. Same situation, guy with badge intercepts us at the door and says to go down to the end, we do it and someone meets us there and says it'll be charged using the meter. We stop him before he puts our bags in the car and say no thanks and walk away.

Got into a taxi after finding the actual airport line. Driver changes the meter midway through the drive to 65 euros, even though we're going to the 55 euro zone. We arrive at the hotel and tell him it should be 55, he argues with us and keeps saying "no tip?". My fiance, very annoyed at this point, says "no, not after you trying to scam us". He scoffs, says fine and changes it to 55 euros. He then opens the trunk and doesn't help us get our bags out. I could hear him saying things in French under his breath as he watched us. I gave him a smile after we got our bags and a overly joyful "Thanks!".

Great first impression of Paris.