What did the Prophet Muhammad (saw) say about trying to prevent someone from passing in front of you while you are praying?
     Narrated Abu Said Al-Khudri:                          The Prophet said, "If while you are praying, somebody intends to pass in front of you, prevent him; and should he insist, prevent him again; and if he insists again, fight with him (i.e. prevent him violently e.g. pushing him violently), because such a person is (like) a devil."