Many supporters consider verbal and written threats of imminent physical violence sufficient justification for a defensive response in a physical manner. Those threats would then constitute a legitimate limit to permissible speech. Because freedom of association entails the right of owners to choose who is permitted to enter or remain on their premises, legitimate property owners may also impose limitation on speech. The owner of a theatre wishing to avoid a stampede may prohibit those on her property from calling ‘fire!’ without just cause. However, the owner of a bank may not prohibit anyone from urging the general public to a bank run, except insofar as this occurs on the property of said owner.