Why: DMCA takedown request is a very specific process and it requests immediate removal of content. Poster can then dispute it to get it restored. (http://brainz.org/dmca-takedown-101/) As far as I understand your post, that's not what you submitted since modifying the content / replacing the author is not one of the DMCA outcomes.
Possible: "Asking SE to reown/remove plagiarised content"
Why reowning is a bad idea? Because you didn't create that post and the post has effects inside of SE system (reputation, comment addressing, etc.). Nothing of course stops you from requesting a takedown and posting the same content again from your own account. Request to reown some already posted content seems a bit dodgy to me.
Yes, leaving RoR behind is certainly one reason for some people to use snap. But even for people who didn't fall into the rails trap, haskell is much nicer for web development than most languages (PHP, python, java, C#, etc).