Don’t forget all the fun chemicals they leave in the atmosphere when they deorbit.
In fact, increasing Earth’s albedo by pumping certain types of chemicals into the higher layers of the atmosphere has been proposed as a possible geoengineering solution that could slow down global warming.
I wouldn’t be surprised if the entire project was architected as a way to completely sidestep regulatory approval and test geoengineering theories before climate change really starts to pop. Elon and his fellow plutocrats are undoubtedly sociopathic enough to do that.