Everyone gets big mad when someone with money acts like Aaron Swartz did. The only bad thing about OpenAI is that they're not actually open sourcing or open accessing their stuff. Mistral or Llama "training on pirated material" is literally a feature, not a bug and the tears from all the artists and others who get mad are delicious. These same artists would profess literal radical marxism but become capitalist luddite copyright trolls the moment that the means of intellectual production became democratized against their will.
If you posted something on the internet, I can and will put it into ipadapter and take your style and use it for my own interests. You cannot stop me except by not posting it where I can access it. That is the burden of posting anything on the public internet. You opt out by not doing it.