Would love to hear your prospective further.
Agreed -- I don't think personal posts need the anonymization as much as perhaps political discussions in oppressive regimes (at which point getting the technical security stack right seems higher ROI than worrying about de-anonymization).
You'd only make yourself identifiable by railing about the same things over and over again, and I think this is something you don't even need a machine to pick up.
I'm not saying I disagree with you. I want to know more about what you think.
I have not played around with it, but I can imagine querying it through a structure like LearnFromAnyone [0] where one would ask for a sentence (paragraph? document?) re-phrased in the style of a chosen person or group of people.
It feels like writing needs an additional layer of obfuscation. For example, one way to give feedback in a small circle of people might be to have a neutral, anonymous third-party rephrase the idea in their own words -- a bit like running it through Google Translate but less deterministic.
This sort of feature could potentially be baked into a service, as a checkbox. Perhaps in order to post you have to "anonymize" n number of other users' posts first.
Some further reading:
https://33bits.wordpress.com/2012/02/20/is-writing-style-suf...
https://en.wikipedia.org/wiki/Stylometry