Anything is possible with enough compute
I always remind myself of the statistical analysis that was done mostly by hand to break coded messages in WW2.
One could scan this website and be able to group every anonymous coward into a discreet list of personas, and then match those to 'named' posters who follow very similar patterns. Some data points would be: Style of writing, content, topics of interest, spelling mistakes, implied age, implied gender, common phrases, regional markers etc. I imagine there are data points that I could not even conceive of.
Combine that with other off-site datasets that do the same and I could believe individuals can be identified. It only takes one of the datasets to include your real name and bingo!
Google were doing this years ago based on search - they build a UUID of each search and gradually link them when there is a high probability its the same person.
The reason enigma was cracked was because there were implementation failures which leaked data. You are leaking far more information.
If you are serious about privacy then do NOT post on the internet (oh, and don't have a phone, don't go anywhere near a camera, don't go to the supermarket ... in fact, just stay in bed).