It does not seem you can leave them, but you can hide them.All of this sounds and looks amazing. It's all players have wished for.
One question though: If a guild message is created, can players still leave it? Many guilds have messages that not every player is interested in (swap threads, GvG threads etc).
You can and always could. The marked text is just not shown correctly.you still can't copy an url that spans? 2 lines
this and the blinking, when there is no new message, should be fixed please
Edit: sure i use tinyurl.com, but most of the players do not know this