For the first time in our experience, we've seen people selling bags of seed (? - not sure what) to tourists to feed pigeons. Once near the river at the base of the Eiffel Tower and just a week or two ago in our own neighborhood in front of the Centre Pompidou.
This may seem like a very animal-friendly thing to do but it's not. The feral pigeons are a menace and they cost us millions of Euros in damage to precious statuary and buildings. They've become such a problem that the Parisian government has introduced measures to intervene to prevent what has happened to Venice, the almost complete destruction of a vast amount of outdoor art and architecture.
I'm all fired up about this at the moment because today we were on one of our bi-weekly urban hiking excursions and we ran across both the pigeon food sellers AND a couple attaching a lock to the Pont des Arts bridge.
Had to rant. Couldn't help it.