I dont get the BPA

While I agree there are overwhelming pluses to the BPA strategy, I think common sense should be considered.

Take for instance Detroit....they utilize the BPA strategy and have drafted a WR with their first pick in 4 of the last 5 years. Based on previous years, I would expect in 2008 with the 15th pick they wouldn't hesitate to pull the trigger on a WR if he's the BPA.
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Looking at the next 5 draft picks they passed on some pretty good players:

2007, Calvin Johnson and passed on Joe Thomas, Gaines Adams, Levi Brown, Laron Landry and Adrian Peterson. The jury is out on whether this was a good/bad move.
2005, Mike Williams and passed on: Demarcus Ware & Shawn Merriman.
2004, Roy Williams and passed on DeAngelo Hall & Ben Rothlesberger.
2003, Charles Rogers...passed on Terrence Newman (the other 4 were terrible).

The Lions have lots of problems--poor drafting is just one of them. However, in my book they are "Exhibit A" that drafting BPA in the first round without consideration of needs is a strategy fraught with peril.