Isabella Lee wrote a great post "How to Impact Your Local Drone Legislation...". The section around signing a petition online was interesting. Where do we find these types of petitions?
Airspace Link, Inc. is running several campaigns in US municipalities to measure the sentiment of its citizens and businesses. Local governments embed the registry site https://registry.airspacelink.com into the government website along with an educational campaign. The system builds a 3d airspace model of routing corridors based on the data coming in (commercial uses involving BVLOS and drone delivery pilot tests).