Tolipanebas, earlier in thisthread you said "a tailwind departure: Did you really think that as a pilot you are in a position to request for a more favourable rwy on mega-airports like CDG or LHR??"...........um yes you are.
If you are unable to take-off from the in-use runway due to a tail-wind, you request a take-off from a runway from which performance is calculated to be acceptable........it may result in a delay (25 minutes recently at a busy international airport)!
Are you a professional pilot or a journalist?