[durzagott]

But wouldn't your fake profile start showing up in 'People you may know' section? I've heard Facebook uses IP adresses to link accounts.

So suddenly you have to explain to your real friends/family/coworkers why you have a fake account.

[mirimir]

If your compartmentalization OpSec is adequate, there will be not more linkage between your real-name and fake-name accounts than there is between them and my accounts.