I get where you're coming from - it would make for a cleaner chat.
But the cases are so few and far between that it's simply not worth it.
And sometimes there's nothing wrong with a brief spam fest, just as long as it doesn't become excessive. This is a game after all.
If a specific person is doing this all too often, /report or take some screenshots and post them on the forum and admins can ask the person to kindly shut up.