How to remove 'Chat' Permissoins for a group?

Hey Guys,


after having a whitelist for a while nor, i wanted to try something new.
My default Group is a "Guest" / "Viewer" Group and this Group is only allowed to view a specified MCDoc Text with instructions on getting building permissions. It serveres as an Watcher Group so ppl who are interested in the server can join and watch.

BUT


I can't figure a way to remove chat permissions for those people.
I think I know how to remove the ability to chat with DefaultCommands and Essentials, but I wanted to change to CommandBook for a while now. Im usnig CommandBook for the general commands.


Do you guys know a good way to disable chatting for a specified group or a plugin that is leightwieght and could do that job?



fewsome