the dean
...holy water was being splashed about DIRECTY APPLIED TO ALL SURROUNDING PASSANGERS FROM AN OPEN BOTTLE
So, if I take a bottle of Evian's finest and splash it over my fellow passengers, I would certainly be 'cautioned' by the CC and they would keep their eye on me for the duration of the journey. If I persisted, I might be detained for actions likely to cause a breach of the peace.
But ... all I have to do is say that it is 'holy water' and no one minds? I shall keep a look out for anyone trying to sprinkle me with water during a flight!!