[armitron]

This is a very superficial way to look at things, and ultimately, entirely wrong.

One of the cornerstones of OPSEC is persona creation & management. This is orders of magnitude easier to perform in cyberspace than in real life, and can be used as a catch-all safety -- for exactly when mistakes are made and layers are compromised --.

You will make many many mistakes, but part of a well-implemented OPSEC strategy, is to have those mistakes land in a compartment, an illusionary persona that you created out of thin air. Operation size has nothing to do with it and should be completely irrelevant when the compartmentation strategy used is solid.