If it's hostile, you kill it.
Funny, mine failed after like 3 attempts, I waited 5 minutes and unintentionally navigated away from the page.
I hit back and as soon as I did it says something like "Congratulations! You're all set, come back after playing Halo: Reach, etc. etc."
My guess is that this system was just introduced like 30 minutes ago and is still buggy as a result. Still, I got my nameplate according to the system so I'm happy. :)