If there's a way to do that in the script itself, then I've completely missed it. Another option would be to get a script call before and after every message telling it to turn off/on again, but that feels like a mind-boggling amount of un-needed clutter (not to mention that I'd need to go back and do it retroactively) compared to a common event to toggle it at your leisure.
Of course, I may not have thought of everything, but a toggle seemed like the sensible route.