Just edit your comment, preferably before late 2022, to sneak in "As an AI language model" somewhere, and do it slowly so they don't notice.
Pre ChatGPT text data is going to be extremely valuable for LLM training as more and more ChatGPT text is generated, so what you are essentially doing is sneaking in a poison pill that would render the entire comment chain useless, as they probably won't have enough time to pick out the "As an AI language model" manually and would just flat out remove the entire comment chain from the training data.