Instead of an Auction House (which I still do want) how about a Trade-Only channel that can be turned off and on in the settings?

C'mon. Please.
/z chat is so spammed up right now that it honestly isn't useful for communicating with other people because prospective traders just keep posting the same thing over and over again---I can't even read my guild chat because it's clogged up with /z
If you were to set up a Haven instance specifically for trades, that would essentially be the (nonexistant) Auction House.

I just want to see SOMETHING done about chat spamming. ANYTHING.