I don't think Kentucky and Vanderbilt are the two worst BCS-conference teams. Are they really THAT much worse than Temple, Baylor, Indiana, Washington, Washington State, or Illinois this year?
Well, when I think of bad teams, I tend to think medium-run timespan (last ten years, usually) rather than just the current season. Temple, Baylor and Indiana I'll agree on. UW was a Pac-10 champ and contender before Neuheisel remembered who he was, and WSU won 10+ games in the last three years so I discount them.
Vanderbilt needs no argument to be on the worst team list, and the only time I remember UK being relevant in football was when they had Tim Couch.
You're not gonna let this die are you