I flew Scoot from SE Asia (Singapore or Bangkok, can't remember which) to Germany back in 2019, and they had one functioning water fountain between security and boarding. Needless to say, everyone wanted to fill their water bottles and the queue got long. So long that the plane started boarding before it was half done. Aircrew staff were shouting at people to stop filling their water bottles and get on the plane. We passengers, realising that for once we had some power, refused. We knew they couldn't take off with our baggage but not us, and getting our baggage off the plane would take longer than the delay to just fill our bottles. So we ignored the shouting and filled our bottles. The plane took off 15 mins late (iirc). It felt great :)

I have no idea if it affected Scoot's policy on charging for water on the flight, or the airport's attitude to water fountains. I like to think it did.

Flying out of Panama this year, we discovered that they don't care about water bottles. I would love for airport security to finally get over this idea that water bottles might potentially contain explosives.