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).