My understanding is that Method actors should always want to address their co-actors by their character names, even when not on stage, and to be addressed by their character's name anytime they're on set.
But in the proliferation of "behind-the-scenes" exposes I've never seen this done. In fact, the blooper reel often shows actors calling others by real names instead of character names.
Is there a custom or taboo that explains this? (Or are there no "true" Method actors?)