  Wow, so one attack against the powerful user J.Delanoy and admins block this user essentially without warning? Why are you admins so obsessed with protecting J.Delanoy, is he like your god or something?  Well whether or not he is, you must treat him equally like you treat other editors, just because his talk page gets vandalized doesn't mean you get you use harsher punishments against people like this IP than you would against vandalism against average ordinary users.   