Very supportive of this. Was on a delayed flight tonight (the last day before this becomes effective) and UAL staff offered snacks and bottled water. The United agent begged me to take as many as possible as she said they cannot offer water starting tomorrow and have many in stock. (I don't drink bottled water so didn't take them). I guess this ban extends to airline provided water in the terminal as well.
I hope SFO expands the filling stations for water bottles beyond the few stations now. I think it is very ineffective when something beneficial like this happens and the majority of the impact is to take something away rather than expanding the offering of a positive alternative.