Thread:Monchoman45/@comment-957747-20120127052849/@comment-1997905-20120127164108

Like most corporate products in this world, it poorly solved problems that didn't used to exist. And although staff will tell you it's not article comments reskinned, it's clear that there's really very little difference. For example, the pretty urls you see for Thread: pages are actually just an extra rendering / serving step. The actual data for the ungodly number of pages associated with message wall are stored exactly the same way article comments are. The  tag is clearly referencing Article Comments, not Message Wall. Removing a thread removes all of its comments, the same way article comments do. Were message walls movable, they would, like article comments, move hundreds of pages that, quite frankly, shouldn't exist in the first place.

tl;dr? Message wall is article comments with annoying notifications. It's just a bad feature.