I really cannot understand all this animosity, surely the more information and help we can get for our DS4's the better. I have belonged to the C4 Owners.Org site since it's inception and still find it useful for my DS4 although it's a bit limited.
No one has to join the Facebook one or even like it but as I said, surely more information and help is beneficial.
But each to his own.
2016 DS4 Crossback 2.0 BlueHDi 180 EAT6
2014 Cactus Flair ETG5 1.2
2005 C4 VTR+ 1.6 manual petrol