The problem is most Linux-capable developers, I think either want real security (in which case what's proposed just doesn't do enough), or they just don't care about securing their phones, and to someone who's worth their salt at programing, having a password protection system on the shortcut to the app doesn't actually automatically feel like it's really preventing anything.

If I could code it I would. Right now I'm trying to set up a good Virtual Machine Linux image and get Scratchbox installed in it. Then starting to learn C and Python and going from there. But it'll be a while before I can do what's being asked. (Possibly months)