Kambei, a demand can be anything, anything except HALT, so you can ask them to stop and listen to your propaganda or be destroyed.
Oh and FYI relying on predefined messages to enact piracy is kinda bad form. I have my halt message predefined and my emergency message should they not halt, but everything else is done through impromptu interpretative jazz dances, er I mean typing.
Saint Del is considered a holy healer of diseases of children, but also as a protector of cattle.