It would be great if the simplicity of Waze events reporting could be used for pedestrian events like broken sidewalks, dirty streets, hazards, lightning malfunctions, etc. Something like https://www.fixmystreet.com/ is doing but simpler. Ideally it should take a few taps to be able to report a problem. This would raise number of reports significantly and would provide much granular (spatial and temporal) data. The most simple version would just introduce another set of event/problem categories.