Ok guys
Age of Conan doesnt unregister you from a guildchat untill you log on.
This means you can set up a chatbot/guild bot to spy on the guild. You can read what people are writing being offline/ or on other character.
1. Get in a guild
(1.1 get alt in the guild)
2. Set up bot (test it works)
3. Stay offline spying on the guild - spying their chat from the bot.
4. spy on the guild as much as you want. even after they kick you from guild - you will still be able to read (AND WRITE) in their guild chat. But you need to stay offline with the character, so you dont get registered to new chat channels (none).