So this video is a little odd at times, but I think that the mission of the group is pretty interesting. This is a link to their website: https://carrotmob.org/ This obviously has the potential to make huge social, political and environmental impacts, but is not immediately spatial. I think, however it is a great example of how manipulating a system, or reinventing how that system is used (rather than actually looking to change the system completely) can create beneficial changes.