Egress Filtering: Who Let The Data Out?

A cheese ball headline if I ever I wrote one. My apologies. But, there is a salient question here. We all take the time to review the logs to see what is attacking out networks (right?). We take the time to ensure that our perimeter is safe and secure. We practice our incident response plans to make sure we know who has to do which job, when and who to contact. You get the idea.