Dialogue Effects / Speech Effects: No /say or /emote

As I couldn't find any snazzy LUA scripts or tutorials for WoW LUA screen effects, I was hoping to at least set a state to cause a rare emote.

The problem is that no matter what I change and set, any creation that triggers a /Say or /Emote sends the message to the "Personal Text Effect" and therefore it's not public.

The most obvious tick that could be effecting this after setting trust levels to gullible / maximum is unchecking "No Dialog effects" - checked or unchecked, it fails to /say or /emote.

Is there something I'm missing, or not understanding, or is this feature not working?

---- Edit: It seems while the messages are protected, LUA isn't. My only goal was to make an emote, and a simple LUA script allowed that.

DoEmote("______");