Btw, whoever suggested going to the "banlieue" is an idiot. NO it's not safe for a group with cameras. The "banlieue" is not a zoo.
Poor people are not poor by choice and there is no reason to treat them like animals.
Be careful with your choice of words, and also be careful in your not much thought interpretations. It is not matter of zoo: often the only way we had and have may to know and understand what is occuring in critical areas is thanks to the documentaries of photographers (there are not only wedding photographers, you know?). OP told about her documentary inspiration, and that's sufficient to suggest to a photography student some non standard view of Paris (including a note on recent history). There was also a hint on safety problems, but a wannabe documentarist will sure get informed before doing anything.
Chevy: by the way, if you walk in London with a camera, you could also walk in Paris with a camera, in similar places.