I guess I see Defensive Domaining is domaining with an inbound marketing approach as opposed to the standard outbound marketing approach. For me, I keep a small set of undeveloped low traffic rare domains. I have no intension to develop my domains this decade at this stage. For me the value in the name is the core concepts that I aim to sell through the names. I work on the Intellectual Property behind the domain names. Having a set of prepared brands for the IP means that I have a planned strategy for scaling and growth. I expect to be in a better position to grow my IP when I am in my 50's than today and so I am saving my domains for a future time. I do enjoy retaining a domainer presence on the internet and I try to keep my domaining skills fresh but I don't market my names much and tend to do nothing with my collection except hold and wait.