As most drivers (hopefully?) know, it's pretty standard practice for drivers to alert oncoming traffic to the presence of a waiting police car by flashing headlights at them, once they've passed the police car themselves. Ron Rezendes
alerts us to a potential First Amendment case, in which a guy is claiming that police violated his First Amendment rights
for pulling him over and issuing a citation because
he flashed his lights at others.
"Campbell's lawyer, J. Marc Jones, claims his client's First Amendment right to free speech was violated. "The flashing of lights to communicate with another driver is clearly speech," he said.
The effort is actually a class action on behalf of others who have also been pulled over under such circumstances. It certainly does raise an interesting question in terms of what constitutes "speech" under the First Amendment.