Out of Sight: Out of Mind?

There's nothing (no laws, regulations or even agreements) to stop any country; city; company or even wealthy individual using geoengineering to try to change their local climate. Spraying reflective aerosols into clouds to reflect more solar radiation back into space, in a sweltering California, can apparently inadvertently intensify ambient temperatures in far-away Europe (https://www.theguardian.com/environment/article/2024/jun/21/climate-engineering-off-us-coast-could-increase-heatwaves-in-europe-study-finds). It can be argued that weather patterns are interconnected and currently too poorly understood for human manipulation, even by enthusiastic geoengineers? It seems dangerous to have a situation, where folk can freely mess with their local weather in any way they feel appropriate. Surely, they must have concern for others on the planet? In one sense, this reflects what's happened/i happening with global heating. The countries and individuals producing most of the 'greenhouse gas' emissions, generally suffer the consequences much less than poorer folk elsewhere. It's well known that the 10% richest folk on the Earth, generate circa 49% of all emissions. The poorest 50%, produce only 10% of 'greenhouse gases'!