By: Addison Wylie Alias made me frustrated.  Watching Michelle Latimer’s documentary provoked me in a way that pushed me to talk back to the screen – something I rarely do. Alias focuses on a small handful of Toronto rappers trying to be heard and to please an audience with their music and lyrics.  According to the synopsis, Latimer’s doc “digs deeper than the usual portrait of the rap world as glamour, guns and swagger.”  I…