Can someone tell me how much computing power would be needed for someone to hit the 28-characters "AndCausingCLimateChange6666" in address ?
With Tools like Vanitygen or VanitySearch.
That is an enormous number of possible combinations, roughly equal to 7.5 × 10^48.
To generate a 28-characters in address, it could take trillions of years on a single consumer-grade GPU.

If this is true, then someone was already prepared for this publicity stunt, as I mentioned earlier.