Not your fault in any way. Like I said, I should have searched for the post on 2ch based on some non-substituted string like I did later. It just didn't occur to me in time. It's not a big deal to look these characters up, but it does take extra time so I postponed it.
I know what you mean about the fake thing, I thought the same thing myself the first few times I saw Baidu Japanese spoilers here. Without the post headers being included like they were this time it's not at all obvious whether it's taken from 2ch or made up by a bored Chinese guy who's good at Japanese.
(As an aside, replies in these wall conversations are meant to be written on the other guy's wall or they don't get notified of your reply. It's a bit unintuitive at first, I've made the same mistake too.)