You absolutely can. It just has to be nonspecific. "Kill all lannisters" is fine. "Kill x lannisters in y mall at z time" is not. See : Brandenburg v Ohio, Schenk v US, Hess v Indiana.
>interfere with others' activities (sing loudly in a movie theater),
lmao what? You can absolutely do that. the theater will kick you out but you can absolutely not be arrested for it. what an absurd claim.
>you also can't harass people
You can absolutely do that, to a degree.
>distribute copyrighted information that isn't yours
Not really related to 1A
>Private entities such as your employer can restrict your speech in many ways.
That's not 1A. 1A specifically applies to the government.
>threaten them
You absolutely can. It just has to be nonspecific. "Kill all lannisters" is fine. "Kill x lannisters in y mall at z time" is not. See : Brandenburg v Ohio, Schenk v US, Hess v Indiana.
>interfere with others' activities (sing loudly in a movie theater),
lmao what? You can absolutely do that. the theater will kick you out but you can absolutely not be arrested for it. what an absurd claim.
>you also can't harass people
You can absolutely do that, to a degree.
>distribute copyrighted information that isn't yours
Not really related to 1A
>Private entities such as your employer can restrict your speech in many ways.
That's not 1A. 1A specifically applies to the government.