The way you've transcribed the thread without attribution is disrespectful to Unichan and its history. You've also butchered the conversation and backstory to the images and lost the file names. Some of the images (the ones changed to "1.jpg" or "1.png") have been randomly re-encoded.
I wholeheartedly support ensuring the Unichan threads are preserved for prosperity. But this isn't the way to do *that*. (They should be maintained in tact with the original post numbers, names, conversation and appearance (in short, on Unichan itself or a perfect mirror).)
And apparently, fairly or not, you've offended the Unichan admin severely enough that he's locked out *all* of the twelve stickies. I know he's nearly incommunicable so you probably couldn't have asked permission, but still.
In some countries this sort of thing (depending on to what degree you preserve the thread) would violate database copyright protection; even if the images were uncopyrighted, a collection and arrangement can be. I highly doubt anyone would try to sue over this but I think you were in murky shallows.
It would be better if you'd explained what you were doing in the first post instead of passing this off as fresh user activity.