Interesting. I built a website a few years back called LampNote, which was based around the idea of "virtual noticeboards" approx every 100m apart from each oth

Interesting. I built a website a few years back called LampNote, which was based around the idea of "virtual noticeboards" approx every 100m apart from each other. In an earlier incarnation of that project I had considered solving the same problems using anonymous geo targeted messages, either using an app or email. I quickly discounted that approach, as it seemed like it could become a magnet for all sorts of dodgy characters, and a potential headache legally. The end product I arrived at was something quite different, so I'll be interested to see how you get on with zonemessenger. Good luck!