Talys wrote:3. If someone uses a fake slate, they will eventually be caught. Then nobody will play with them and they'll be laughed out of the store.
"Wow, I had no idea this wasn't a real rule, I saw it on a blog and it looked really convincing. And you know, it's so hard to keep track of what is and isn't real these days."
Also, you can insist Codex only.
So, because you're paranoid about someone cheating you throw out lots of stuff that people expect to be able to use? Do you expect people to be happy to hear that you're not willing to play against the army they've invested tons of money in because you think they might be cheating?