Instead of having to updating the whole messages just to add or remove a message, You can now use the following commands to update the targeted list.

Notes:

None of the commands is case senstive you can write it the way it's easier for you.
Similar to the commands entered messages aren't case senstive which means that the plugin will consider "Bye" and "bye" the same message to avoid adding the same message multiple times.

New Commands:

Quittings:
usage: /Greetings {Add} or {Drop} <Message>
description: Either add or remove a farewell from your list

OldPlayersGreetings:
usage: /Greetings {Add} or {Drop} <Message>
description: Either add or remove a greeting from your list

Greetings:
usage: /Greetings {Add} or {Drop} <Message>
description: Either add or remove a greeting from your list

Feel free to contact me if you encounter any bugs while using the plugin and if you want to add any new features