Meh. Consider that you had no choice and no say that your data out there, both present and historic as mined, aggregated and analyzed by data collectors, was used as a training set for the LLMs. I think you’re a tad too late with your warning. They’re already thieves and they know it. And they know you can’t and won’t do anything about it.

Public/crawlable data is very different from private/internal documents and code that employees might prompt with.