BIG BAD WOLF: So you're talking about a checkmark you enter before pushing the button, like the one that asks you to confirm a challenge match on the Stairs before it will create? I would agree this sounds like a better option than a whole new page.
But there also has to be point at which Fencer says he cannot make the site idiot-proof and declines additional fail-safe mechanisms. He could easily spend all his time doing that, and not get to the other features and new game ideas that people are asking for.