Regarding Bonzi Buddy, I disagree. I think user data is as important, if not more important, than root access - which is why I'm dumbfounded when ancient server security features, like Linux's sudo system, are applied to the consumer device like a PC or a smartphone. These contexts are much better server by a sandboxing, permission-based whatever that seems to pick up steam, like the current permission systems on smartphones. Grandma's logins and bank data will be stolen from her own user account just the same as an admin account. Related XKCD[1]
Ugh, except that one goes overboard in the completely opposite direction, and often doesn't let me properly share data between apps even when I want to.