This is actually a nuisance for older people, for example. I can see it from my parents and neighbors.
At my mother's old Nokia I turned off the sound of the incoming message and the text message, only the envelope icon at the top of the screen remains. Mom doesn't open it, and I delete her texts every few months.
Dad still somehow copes with deleting text messages on an even older Nokia, but when I gave him a newer phone "intended for seniors", he could not cope and returned to Nokia. Same with mom. I only replace their battery every few years.
My eighty-year-old neighbor comes to see me regularly because she is irritated by the blinking light on the phone. As soon as I get a text message with a RCB alert, I can expect a visit from a nice neighbor, whom I show each time how to read and delete the text message. I know that at their age I will have similar problems because I'm already behind with blikami, whatappami, and others.
I solved this "spam" on my phone by adding it to the list of blocked numbers in the "Blacklist Plus" android application - the "add from message register" option. By the way, I block intrusive phone calls from UPC and some agricultural tractor commercials (what would I be doing with the city?).
RCB Alerts - Older people don't read this, younger people don't care. For generations, people have not needed it, and the world is spinning. I understand the intention, for sure it is useful in some areas hit by tornadoes, avalanches, earthquakes and floods. How many times have I received this text message and it hasn't even rained. It's like a story about summoning a wolf out of the woods. When we receive such warnings with a drizzle, people will ignore them and consider them unnecessary spam. There will come a time when the warning will be really necessary and will be ignored because it will lose its power due to overuse and nuisance.