This is a bad idea. You should not do it. Please do not smash your phone — especially not yet.
So here's the deal. You'll initially be registering for a chance to smash your phone. If you've already smashed it, you're SOL. Sorry, Charlie. OnePlus will randomly pick 100 folks to smash phones on camera. In exchange they'll get a free 16GB One, plus three invites to purchase more.