No Constitutional “Right” is absolute. The framers were not that stupid. To quote the cliche “No man has a right to shout fire in a crowded theater.”
You most certainly DO have a right to shout "fire" in a crowded theater.
You may do so without negative consequences if, in fact, there is a fire. You may do so if you are an actor on the stage and the script calls for it.
You don't need a license. You don't have to be registered. No training is required. You may say it as many times as you wish or think prudent.
The government has no say in the matter and cannot exercise prior restraint to prevent you from shouting fire in a theater.
And, very similar to the keeping and bearing of arms, you have a responsibility not to unreasonably engender panic in the crowd.
You, evidently being one who would panic in a crowded theater if someone shouts "fire", would also panic if a person were to bear arms in your presence; except, of course, if that person were wearing a police uniform, regardless of whether the person was actually a policeman.