In its original producing country it's often used as an expression of excessive softness ("tofu mental" for instance, for mental fragility). But it's also cute and inoffensive, I think it's a nice name overall.
I think OpenTofu should embrace the negative connotations. Go crazy, make everything Tofu, that's the goal. It'd be a nice side history for marketing purposes. I doubt anyone would not use the tool because of it and others would get a good chuckle.
Is terraforming even a thing outside of the realm of SF? I can't say I've ever seen it depicted as anything but positive, since it's taking unlivable planets and making them livable.
there are countless SF examples where terraforming is used against the protagonist group in some negative manner; some alien race begins some scheme to turn the planet hotter/colder/acidic/whatever and has to be stopped by some hero.
as far as being a thing outside of SF, there are lots of studies on the idea of being able to do it in one way or another to both the moon and Mars, with real life validation efforts here on Earth -- but no real practical efforts as far as I know.
p.s. the reason I avoid mentioning our efforts here on Earth changing the climate being akin to terraforming is that I think that intentionality is really the defining feature of terraforming that differentiates it from pollution or abuse otherwise.
There are plenty of examples of terraforming going/having gone wrong or being abandoned.
My first associations are Snowpiercer (overdoing the fight against climate change) and Stellaris (abandoned machinery on planets).
