[jsarno]

Both sides of this argument have merit. I personally don't care either way, but I would have to lean towards guilty cause the test is cut and dry. It shouldn't matter where, or how a banned substance got in your system, it only matters that it did. Is it an unfortunate circumstance? Absolutely. (assuming you believe the story anyway)
The argument that makes me laugh is that "they have to make weight, so they took something to help them lose weight". OK...I get you need to lose weight. You are an athlete, act like one. Don't go nuts during the offseason and get way out of shape just to rely on a pill to get bring you back. The label should DEFINITELY say what's in it, no question, but that's a future legal action for the Williams'. That should be of no concern to the NFL. Horrible scenario, that's for sure.