That's EXACTLY what I'm talking about. They specifically told him the intercom had not worked for years, but they have used it numerous times to screw with him. And he should realize that.

He should not have reacted to it at all. Play dumb.

Sad to say that probably the biggest fault with the Losties is that as a rule, they are sane, and basically good and moral people who believe that everyone else must be as well.