Maybe if you attach #NoAI next to the content it would be filtered out.
But from a copyright standpoint, unless it regurgitates training data which is rare and only happens with a specific prefix, LLMs should be safe. They are decomposing, recombining, and regenerating language, not copying it. They execute user commands, not imitating any author on purpose.
Say you want to read Harry Potter without paying, would you rather borrow a book or ask chatGPT to regurgitate the original? It would never work well, and be slower and more expensive to use AI. It's not a tool for infringement, it will naturally hallucinate and degrade the original, it can't possibly store a perfect copy of everything it trains on.
In fact LLMs often use 15T tokens for 15B models, so 1000:1 compression ratio, while diffusion models compress 5B text-image pairs into less than 5GB model, so they hold about 1 byte worth of information from each training example if averaged out. There is no space to put all that copyrighted data in a model, it necessarily compresses the hell out of it. Plain old piracy is still 1000x 'better' than infringement by AI.