I do think it's an idea, neither good or nor bad, but perhaps for convenience's and old-timers members' sake, it works.
If anything, though, it will sure help in making the
Exquisite corpse collaboration much more enjoyable and streamlined, without that ever-present "Spoiler" interruptor.
To expand upon this, and actually ask for something I've meaning to for the better of a year now, I'll say is there any way we could add the [spoiler] tag, and turn it into a clickable button on the expanded text editor box? Something simple: a button that says 'spoiler' on it, and does the ordinary function of what encapsulating a block of text inside the [spoiler] brackets would do.
(And so long as I'm here talking about buttons, I've also been wondering what exactly the 'Digg' button does, but I have not yet figured out how to use it.)