I found a thread about this on Bike Forums from 2016 thread, and I would like to revive interest because in my experience it has helped law enforcement address dangerous drivers. I was an avid CCDB (Close Call Database) user before it went on hiatus some years ago... and three times I had a measure of justice brought to aggressive drivers (in Boulder County, Colorado) because they had at least two complaints recorded by other cyclists. Law enforcement told me this helped them follow up with the aggressive drivers (two drivers rolling coal and both eventually moved out of my county, and one driving recklessly close to cyclists who also moved away after the sheriff visited them). In any case, CCDB was on hiatus but looks like it has returned, and I urge everyone to check it out, and participate if that feels right to you.