Hi Brianna,
I would agree with you, but recently I found an interesting horse-related picture: http://commons.wikimedia.org/wiki/File:Polo_070922_18-crop.jpg , very useful into [[Category:Animal welfare]]. I was seriuosly tempted to create a new category "Horse abuse" inside that category, but it could be offensive to the rider, who posted that image as "normal", and far from NPOV... so I created a  category: [[Category:Controversial animal use]], and this, at my best, is a NPOV categorization.

So, I found by experience that NPOV is a concern, and a deep one, into Commons too.

Alex