I'm starting to do some workflow design with SharePoint 2010, and I like the idea of the Impersonation Step. I plan to use it to modify the security settings of submitted items (such as not allowing a submitted InfoPath form to be edited once the request has been processed).
I understand the Impersonation Steps run "using the permissions of the author". Now, does that mean that WF actually impersonates the Author's identity when the step is called? If so, what happens if the author leaves the organization and their account is disabled? Does the workflow fail? If that's the case, how can I create a robust workflow which can survive even if the workflow author leaves?