Perhaps they could offer a small separate sort of "Flash Guard" utility for the blocking function. We consider the possibility of rogue Flash code opening the camera and/or microphone to be a security vulnerability. Being able to block those globally is a "feature" some need.

Of control of hardware access should be by user choice only, not a side effect of an app. Counting on stored Flash settings isn't an option since many use Better Privacy (Firefox extension) or other utilities to delete Flash storage, including the settings, due to the stalking features.