I'm curious if this issue could be resolved by moderation and reviews so that people that want to talk about similar things are paired up and trolls are blocked/isolated.
Although they can't reject too many rides or risk being flagged in the system, at least this gives them the ability to pass on riders who have a bad score, which last time I found out about the rider rating score was anything less than 4.5 out of 5 stars[1].
Fortunately, for something that the French Number is offering, it doesn't seem that this would be a problem. Hopefully the offering remains uncorrupted in this sense.
[1] Anecdata warning: Based on a discussion I had with an Uber driver over several months ago.