[deong]

That's not the right analogy. It means you're not allowed to sue someone else for requiring an ID check in order to let you shop there.

I'm not a lawyer, but I'd be surprised if this defense was particularly robust anyway. It seems you'd just have to argue that there's some slight difference in the situations and that's why I'm doing something that guy shouldn't do. But either way, you're not taking away the correct message from his example.