[SDPhantom]

Originally Posted by bsmorgan If Blizzard increased the size of the ignore list by an order of magnitude, then I might be able to get some peace. I don't want to turn Trade off completely because I like to respond to trade/profession requests. I believe this addon could actually return "my" Trade chat to what I believe was originally intended.

I'm not experienced in the field of algorithms, but I know some addons exist that bypass Blizzard's built-in ignore list and keep track of their own that can be indefinite in size. The method I would use to achieve this is to keep track of a list of players you want to ignore and register a filter through ChatFrame_AddMessageEventFilter(event,function).

Here's an example of a public channel ignore filter.

local IgnoreList={
	"Bob";
	"Tom";
};

ChatFrame_AddMessageEventFilter("CHAT_MSG_CHANNEL",function(self,event,...)
	local msg,sender=...;
	for i,j in ipairs(IgnoreList) do
		if j==sender then return true; end--	Filter out matches
	end
	return false;--	Let the message through
end);

This will filter out any player named Bob or Tom that sends a message through any public chat channel. (General, Trade, etc.)
See WoWPedia:Events/Communication for a list of events and the arguments they supply.