Sorry, I forgot to reply to this yesterday. That thread is too long for me to go through entirely. But, from what I saw on the page to which you linked, there is one poster responding to a number of messages, but isn't sock puppetting. That thread seems to have attracted a "unique" group of posters.

Not sure if these are from the same poster, but if they are, they've got a sock puppet feel to them.

http://www.dcurbanmom.com/jforum/posts/list/210/275783.page