How does that defend against something having trained on a corpus of your own previous writing?

I think what they're saying is, run a local model to transform all your comments before you post them.

	▲	CTDOCodebases an hour ago \| parent [-]
		Bingo. It can’t help with old writings but it can with new writings.

H8crilA 2 hours ago | parent | prev [-]

Exactly as much as closing your eyes and covering your ears.