The only safety ( anonymity) anyone has is that no one is worth the effort to be found, of course the random vigilante flesh search’s show it doesn’t take long to be found if the effort arrives.
Instead the real concern for me is both the public internet archives and the private caches sequestered around the world. If the human race survives long enough to breed a singularity, it would be seemingly trivial for an artificial intelligence to back trace people from the dawn of their first public forum post to the dusk of their last