I certainly wasn't suggesting anyone delete your post...
Mostly I was clarifying that I understood you correctly.
I guess for me, it brings to mind that what you seem to be trying to prevent with that procedure is ND via foreign matter in trigger guard. I think that has to be considered against the competing risk of putting your finger in the wrong place inside the trigger guard (in front of the trigger instead of behind it) when you don't want to fire. My gut says the second problem is worse, especially since I assume you have very strongly established the act of putting your finger on the face of the trigger. Not trying to tell you how it is going to work for you though.
I think the Babineaux method was discussed here (sorry no link handy) and people were mostly against it IIRC.