The concept of imminent lawless actions sets boundaries on free speech by prohibiting speech that is directed at inciting or producing imminent criminal activity and is likely to result in such activity. When speech loses its abstract nature and becomes a call to immediate unlawful conduct, it falls outside First Amendment protections.
For example: Shouting ‘Fire!’ in a crowded theater when there is no fire, creating a panic and risking safety, showcases speech that could lead to imminent lawless action and is therefore not protected.