"To a certain extent, memories are societal properties," says Adam Kolber, a visiting professor at Princeton.
"We really need to articulate a moral code that governs all this," warns Arthur Caplan, a University of Pennsylvania bioethicist.

The skull wall is not relevant to nodes of memory which is all shared.

Besides the obvious volume and management limitations of our 'wetware' memory, now it seems it is unsecured anymore. It's time to find a secure space to hide our private memories outside our skulls.

accessible to search engines? indexed? tagged?

If you have censorship in a society, eventually the right of government to control the brain will exist; to not only lock you in prison as now is done because one might disagree on a point of PC history, but to lock you up for what you think!

After all, who could argue the reality? If you think that a historian PC approved might have gotten it wrong, there is a real danger you might actually say that aloud!

Must eat brains for information! (Zombie Voice)

Reminds me of the movie "Fortress".