The content you've posted on Stack Overflow (or other Stack Exchange sites) is available under a Creative Commons license. Anyone can re-use it, provided they follow the attribution requirements spelled out by the licensor. These requirements are listed at http://blog.stackoverflow.com/2009/06/attribution-required/, and this user is not in fact following them.
On the other hand, the fact that e has linked back to the original post -- no real obfuscation, in other words -- indicates probable good intentions. Given notification of the exact requirements, e may very well edit the posts to conform.
If you can locate the user on SE, you can mention it here, or you could post at the forum you've identified. Alternatively, leave it up to SE, Inc. to contact the user or the forum owner.
Pekka voiced his suspicions below that good intentions are absent here. If you also believe that to be the case, then you should see A site (or scraper) is copying content from Stack Exchange. What do I do? and follow the procedure outlined there, leaving it in SE, Inc.'s capable hands.