You need to be logged in to sign up to events.
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You cannot re-sign after you have unsigned! Do you want to unsign?
All the text in each textbox should be no longer than 255 characters, so they will fit in a macro.
The commands should be run in sequence, from top-down. The first two commands declares variables with all the names, and the last one checks those lists to determine if the player is in your group or not. If they are not in your group, the name will be printed in your chat.