Even without you vouching for it, lumping the user who created that thread with the rest was a baseless suspicion. A quick forum search clearly shows that s/he is an active community member with many posts including in the sub-forums as well.
I was going to reply earlier but I wanted to keep a legit forum goer's username out of this thread, since it doesn't even merit any discussion for atleast that account. Just because there is no avatar or forum tag, it doesn't automatically make it a suspicious alt. This is why I personally make an effort to not throw around accusations based on assumptions without any proper context.