It is funny how there are people who even think this is arguable. As there gets to be more money involved in college football, rankings mean more-and-more financially to a conference. Vandy is not going to a BCS game...they most likely won't even be ranked this season. If things go right, USC could remain in the top 10 for much of the season and maybe be another BCS team for the conference. If they get upset by Vandy it makes the road to the BCS a lot tougher (particularly with LSU on the sched). It is not as good for the conference if a top ten team loses to an unranked team. If the officials can make a difference with a non-call here or there, they will. It happens way to often to deny. I know all of you who survive on a steady diet of rainbows and unicorns can't imagine this type of thing goes on....but there is too much $$$$ in this for it not to happen.
If that's your argument then it would follow that in the SEC highly ranked teams with large and rich fan bases wouldn't lose close games because the officials would help them but instead we see;
Florida
2010 - Ranked 22, lost 7-10 to lower ranked Miss. St.
2008 - Ranked 4, lost 30-31 to lower ranked Ole Miss
2007 - Ranked 9, lost 30-42 to lower ranked UGA
2006 - Ranked 1, lost 17-27 to lower ranked AU
2005 - Ranked 12, lost 22-30 to lower ranked USC
Georgia
2005 - Ranked 4, lost 10-14 to lower ranked UF | ranked 9 lost 30-31 to lower ranked AU.
2006 - Ranked 14, lost 22-24 to lower ranked Vandy
2007 - Ranked 12, lost 12-16 to lower ranked USC
South Carolina
2011 - Ranked 9 lost 13-16 to lower ranked AU
2010 - Ranked 10 lost 28-31 to lower ranked UK
2008 - Ranked 24, lost 17-24 to lower ranked Vandy
2007 - Ranked 8, lost 6-17 to lower ranked Vandy. Ranked 17 lost 24-27 to lower ranked UT.
Tennessee
2005 - Ranked 23, lost 15-16 to lower ranked USC
2006 - Ranked 8, lost 24-28 to lower ranked LSU
Kentucky
2007 - Ranked 8, lost 37-45 to lower ranked UF.
Arkansas
2006 - Ranked 5 lost 26-31 to lower ranked LSU.
2007 - Ranked 16 lost 28-41 to lower ranked Alabama.
Alabama
2010 - Ranked 1, lost 21-35 to lower ranked USC. Ranked 5 lost 21-24 to lower ranked LSU.
2008 - Ranked 1, lost 20-31 to lower ranked UF.
2007 - Ranked 16, lost 23-26 to lower ranked UGA. Ranked 21 lost 12-17 to lower ranked Miss. St.
2005 - Ranked 4, lost 13-16 to lower ranked LSU. Ranked 8 lost 28-18 to lower ranked AU.
Auburn
2008 - Ranked 14, lost 13-14 to lower ranked Vandy. Ranked 23 lost 22-25 to lower ranked Arky.
2009 - Ranked 25, lost 24-31 to lower ranked UGA.
LSU
2010 - Ranked 6, lost 23-31 to lower ranked Arky.
2009 - Ranked 10, lost 23-25 to lower ranked Ole Miss.
2007 - Ranked 1, lost 37-42 to lower ranked UK. Ranked 1, lost 48-50 to lower ranked Arky.
2005 - Ranked 4 lost 27-30 to lower ranked UT.
Ole Miss
2009 - Ranked 4, lost 10-16 to lower ranked USC.
Mississippi State
2011 - Ranked 16, lost 34-41 to Auburn.
So there, that's 35 games in the last seven seasons that disprove your theory. If SEC officials were rigging games we wouldn't see nearly that many. Three are close games where the eventual national champion lost to a lower ranked or unranked team; UF v. Ole Miss, LSU v. UK and LSU v. Arkansas. SEC officials in your view of things definitely would've attempted to prevent that.
There's the unicorn and rainbow side of the argument, where we find all the facts and there's the conspiracy theorist side of it where we find a few sparse pieces of anecdotal "evidence." These missed calls happen in every game of every conference. It just happens that this one fits your theory.