I like the idea of a privacy classification system, along the lines of movies or video games. With at least some public focus on privacy, perhaps this is the time to create an industry standard?
I've been wishing for something more along the lines of open source licenses. GPL might be a complicated contract but once you know it, all you need is 3 letters to describe it. You've still got the option to write up your Special Snowflake 1.0 license, but most products won't need that or want it, so a few common contracts emerge and then we don't all need to skim pages of legalese (subject to change at whim) every time we visit a new website.
A standard could certainly contribute to informed consent by the people who purchase/use devices. It's a complex concept to summarise and distill into iconography though.