"Those who took their basic gun safety lesson to heart, and swore to be a lifelong safe shooter by obeying the simple rules first presented cringed a little when they learned about the "snap cap" concept.
Shotgunjones - you PRESUME to speak for a goodly number of folks, there.
Be advised, Sir, you DO NOT SPEAK FOR ME.
If you choose to cringe at the thought of an inanimate snap cap, that is your problem. I do not so choose.
However, I do recognize the potential problem when a snap cap is present with live ammo. A shooter who has a snap cap on or about his/her person, and is tired, harried, or otherwise distracted, is a combination that is potentially tragic.