I read about this on BBC, it looks really great, unfortunately I can't remember the plates of any of my friends in the uk!
http://www.betterdrivingplease.comYou can report incidents of good driving too.
It would be hilarious in France, I mean to report people for poor parking would include the entire nation, 90% of motorcyclists weave through traffic, and (I know, I know here we go) it's common practice for most cyclists to jump red lights, go down 1 ways the wrong way and all that (I've even done it on my club run).