You're spinning off into tangent land PopeMobile.  The point of documenting your package is so that the shipper is not personally held responsible or receive negative feedback whether ebay or trade forums for carrier's mishandling and that the insurance can be implemented. 

You clearly have a system and a track record and choose not to do that, no worries. This info is aimed more at someone who is on the newer side of shipping multiple items and needs to implement a plan.

I run a company that ships out bulbs and other parts for televisions and send out 200+ via usps and another 100 via fedex & ups daily and that's just bulbs.  I have over 1300 listings currently and we are 10 transactions shy of hitting 21k in feedback.  The point of this is that if you can show paypal/ebay/shipping carrier the process of your packaging and how it is replicated then you will win a dispute time and time again.  I get shipping credits monthly for their mishandling of deliveries.  It works for a power seller and it works for my personal ebay account.

I probably wouldn't want a marked card either, but I can understand as to why it is needed.  I deal with "switcheroos" daily as people try to return their old bulb as a new one to receive a refund and we mark our bulbs in a way to identify them as ours to prevent scams.