Create a new account every so often, don’t leave any identifying information, occasionally switch up the way you spell words (British/US English), and alternate using different slang words and shorthand.
Perhaps you could use a local translation model to rephrase (such as TranslateGemma). If translating English to English doesn't achieve this effect then use an intermediate language, one the model is good at to not mangle meaning too much.
sample content from users on this page: https://news.ycombinator.com/leaders
and ask the LLM to rephrase it in their voice