As one who was a regular poster on than other site for a decade, and generally go to to other web sites before big game, I give you several reasons.
First of all its fun to talk football with knowledgeable fans from other teams. Lloyd is a good example of what you hope to find. Second, you might just learn something. We know the Pats better than other fans. Why would it seem strange that a Ravens fan could offer some insights on their team that we might miss. Third its just different. LIke going to a new restaurant. I wish we were a bit more tolerant to opposing fans here. Be more welcoming perhaps. Give them some time to prove they have something interesting to offer, even if we disagree. Then if like with Raven 7 he proves to offer nothing substantial, send him back to his board and tell him to bring back the grown ups.