SendChatMessage with channels "SAY" and "YELL" require hardware event to trigger, i.e. they can't be used. A basic test with "EMOTE" seems to work though:

f = CreateFrame("frame");
f:SetScript("OnEvent", function(e, ...) SendChatMessage("x", "SAY") end);
f:RegisterEvent("CHAT_MSG_SAY");

This can be (ab)used for auto sharing again.

To be done: implement it

Closes #36

wontfix for now, since I consider it a hack, and if people start to abuse it in "spammish" ways, such as WBT would, it will just be disabled like "SAY".

Closing since wontfix. Better options are listed in #65.