Sadly, they exist irregardless of our little projects. Financially supporting them is one thing, and if your own ethics prevent you from using a weapon of the enemy, as it were, that's fine, but abstention is not actually doing anything to oppose them.
The water consumption of any LLM compute time I've used is almost assuredly less than a single bath, and I've certainly skipped more baths in my life than I probably should have. :P
And more importantly, an hour of Netflix uses SIGNIFICANTLY more water than an hour of text LLM generation, so most people are not actually having the impacts on water consumption they likely think they are.