Yes, Called by the Grave (and Imperm for that matter) doesn't need to be chained directly to the activation of the effect you want to negate. The act of ordering effects, so that some cards cannot be directly chained into, is called Chain Blocking. Really useful against Ash and omninegates, if...
Reading cards? In my fictional duels? Granted not reading cards can be explained by duels being realtime in the anime, where you don't have time to read, but unless there were timerules, one should be able to read all the cards the opponent has during a neutral gamestate.
Which Yuya did one time...