I regularly find myself canceling out unlock prompts when navigating various folders in the Finder. It appears the primary reason has to do with information displays (such as folder size). If I view the root of my hard drive as a list and have calculate folder size enabled, I end up being prompted at least once for EVERY folder I have secured on my system...
This gets rather annoying very quickly, however fully disabling options to calculate folder sizes system wide seems like a major limitation for a couple secured folders. I figured I'd whitelist Finder then use the menu to unlock folders, however I found when selecting the option to unlock a folder in the menu ONLY opens the folder in the Finder... Since its whitelisted it then NEVER prompts me for a password making it impossible to unlock the given folder...
I seems there is only two choices here. The first is to disable the feature to calculate folder sizes and the display of the number of items in a folder below the icon completely, or deal with regularly having to cancel out prompts to unlock folders nearly every time I open a Finder window... There should be some alternative setting for the Finder that will allow the prevention of the constant prompts without fully blocking access to secure folders...