alt Hacker NewsProse fingerprinting is indeed worrisome, but it's a solvable problem once you are aware it exists. For example, if you contribute here anonymously, but don't contribute elsewhere, there is no corpus that can produce an accurate match.
Many people communicate differently in different contexts. It's common to try and match the style of the community in which you participate.
I am not convinced that having your identities merged for you is inevitable.
Its inevitable because of capital incentives.
Someone makes money identifying you and selling that data to advertisers.
If your pseudonym is famous/infamous someone makes money / cultivates attention if they identify you.
There is a basic instinct to uncover the unknown.
Unless the above systems are disabled then the drive to unify identity will be ceaseless.