If you're trying to raise awareness for a cause - especially if that cause is providing toilets for the 2.6 billion people in the world who don't have one - there are worse places to start than piloting an RC turd. I think.
WaterAid is the organisation responsible for the stunt, in which Londoners were accosted by these presumably fake poops-on-wheels as part of their "Make Toilets Not Graves" campaign. Safe to say they've got my attention. [copyranter via Laughing Squid]