I'm not surprised at the overall feeling of BA.com on here. There a lot of pretentious blowhards on that site. I do find it a very useful website when browsing the liquor store however.
First of all, when looking at the top rated beers of course the rarity will effect the rating. People hype them in their mind. However, all the beers I've had on that list (including DL, Abyss and Wv12) are incredible beers and worthy of all their praise.
IMO, BA.com is best used from a high level. If a beer had a lot of reviews, then trust the rating. Look at the letter score (A, B-, C, whatever). It's usually a very good indication of the beer's quality. I very rarely read reviews, though I do occasionally read ones by the brothers because they generally know what they are talking about. But don't waste your time reading the 17 descriptions that someone took the time to dream up regarding a particular beer. Your impression will be very different, probably much more honest and reserved, and should be the only one that matters to you.
Basically, use BA.com like a scale, if it says a beer is good, it probably will be. And vice versa. Take any "rankings" as a grain of salt. Everyone's opinion will of course be different.