I am using the word 'hail' in the sense introduced by Althusser, who describes 'that very precise operation which I have called interpellation or hailing, and which can be imagined along the lines of the most commonplace everyday police (or other) hailing: ‘Hey, you there!’ '
Althusser, L (1970) Ideology and Ideological State Apparatuses (Notes Towards an Investigation). In: Lenin and Philosophy and Other Essays. New York: Monthly Review Press. Marxist Internet Archive [online]. Available from: http://www.marxists.org/reference/archive/althusser/1970/ideology.htm [Accessed 4 December 2012].