I can understand why people don't want a global chat channel system. There fears are not unfounded it very likely will be used improperly similar to the market wards at the start of the game. I also don't think these global channels are going to magically create a sense of community (especially if everyone just shuts them off because of spam).

On the other hand global channels are nice for having conversations, occasionally putting out information about something that only comes around once or twice, and perhaps recruit for LS's if your into that (I'm not all for that but I know others are).

If they do add global chat channels I'd appreciate if they added channels that are reserved for only players at max rank. Ex. Once Joe Awesome hit's Archer rank 50 he can now speak in both the global rank 50 chat (for any player with any class at rank 50) and the Archer rank 50 chat (reserved for Archers who achieve rank 50) channels. These channels would virtually have no rmt spam, would avoid any low rank clutter from interfering with people trying to gather only high rank players and sell high rank items, and give players of the same class the ability to talk to other players of that class to potentially improve their play style from the experience of others.