I agree with Horseman kind of. There should be a command called /togglechat. When you want to chat worldwide, turn /togglechat on. When you want to chat within 100 blocks or don't want to chat at all (means no one is by you), turn /togglechat off. If you can do this in the future, it would be pleasing for me and other people. It's a suggestion, which probably should be in suggestions but I'm talking about this thread. So if it's possible... Do it!