alt Hacker NewsIf you keep them distinct unification is a weapon to be used against you. You're writing your own blackmail someone just has to call you on it.
With prose fingerprinting, sophisticated tracking, now your identities are only separate by rapidly eroding social convention. Intentionally merging them allows you to have control over the process, and helps you maintain discipline about what you reveal where. If you don't do it it will be done to you.
Prose 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.