Quote Originally Posted by BatHead View Post
Not sure what you mean.
If you set your online status to "Busy" via the /busy command or Edit Search Info, you will block all incoming tells or party invite. I think it should also block incoming FC invites.

Then again, if you don't want to be part of any FC you can always form one yourself but you will need 3 other players to sign the petition (They can leave afterward).