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Ask the airbnb owner before you book the place. That's what I just did in Casablanca. I copied pasted the same intro message to the hosts of the places I was interested in and I had some positive...

Don't argue, use the key word: police.

Or ask them from the beginning to run the taxi meter if you don't see it running (it's called computer in French and they understand the word).

As far as...

Useful info: they give free sim cards in the airport.