As you seem to know this is indeed something you can do. I'm not sure if you should, but that's another matter... I can understand that you want to get the name out, but please always ask the user before doing any activity. If you violate user's trust, it's game over. You will be labeled a spammer.
Sorry shepherd, I don't understand what you're saying.
By "will be labeled a spammer" I mean literally. Concrete spam claims, posted in a place where they're linked to your app. There's a change that you're required to have a Facebook app page, and that's a place where people can complain about you.