Someone sneak up and grab the reg under your chin because it has a yellow face plate? Not likely.
But if you are worried about it use the yellow face plate reg as your primary and bungee the other one.
Which will no doubt bring up an objection in your mind, "But my octo is an inferior reg... why would I want to use that as my primary?"
Which brings up a couple of questions in my mind, "Why would you want to hand an inferior reg to an OOA?" and "Why isn't your backup/octo the same reg as your primary?"
Which (last question) would probably be answered, "Because that is what they sold me at the LDS."
Which would also answer the first question.