How will cyber criminals make a buck once we have pervasive digital identity on the internet?

I proposed the following topic:

Let’s role play as aspiring cyber criminals, 10 years from now, when there’s a ubiquitous digital identity layer that is part of all digital interactions over the internet. How do we make a buck or a billion?

for dinner conversation at the upcoming Harvard/Berkman conference on digital identity. Apparently they have a Berkman conference tradition called Food for Thought dinners. These dinners are informal gatherings of about 8 people who gather around discussion questions and are lead by one of the conference panelists.

I wonder whether we’ll find a killer business plan in there ;-) and if so, what we can do about (ahem, against) it.