It should be no secret to anyone at this point that there IS a difference between blogroll links and link in posts.
Google is EXTREMELY familiar with the structure of vBulletin. There are tens of thousands of well-indexed vB boards out there. When it comes in here, it already knows what a sig is -- and think about, just logically -- if there is this wad of code in the same place every time you post, and the spider sees it is there whenever "you" are there, it simply integrates into
You. Like If I am a doctor, I know what a hand is, I have studied-up on hands real good in anatomy class. When I new patient comes into my office, I don't run to him in amazement and wonder what those 5-pointed things are at the ends of his arms. I presume to look for DIFFERENCE -- "How is this specimen NOT like the rest?" The doctor thus forms his diagnosis, the spider its place for you in its heart.
Links in posts are where a blogger would indicate his INTENTIONS, his ACTIVE VOLITION AND PREJUDICES would be in evidence there. Those are the things that
blogsbyhumans have plenty of. Now, the blogroll on that there blog, is not link any blogroll you've ever seen --
2hp