sums up all the negatives and positives in a few paragraphs.. there are 9-10 core points in the article that we have all re-hashed a million times.
http://www.pennlive.com/pennstatefo..._can_mask_deficien.html#incart_social_feature
http://www.pennlive.com/pennstatefo..._can_mask_deficien.html#incart_social_feature