Maybe not in the restaurants, but in private life. For example, when I went there as an exchange pupil, I lived with a family that had potato crisps as a side dish.
If you come to Paris as a tourist, of course you can also stumble into a lot of bad restaurants that are just looking to rip of tourists. Of course good stuff also exists.
As a french, I think that "potato crisps as a side dish" is a good idea when receiving a young child. In schools, childs often refuse to eat vegetables and prefer to choose french fries.
When receiving a foreigner, I will ask for his taste before deciding the menu.
If you come to Paris as a tourist, of course you can also stumble into a lot of bad restaurants that are just looking to rip of tourists. Of course good stuff also exists.