>How would you go about showing that objectification is inherently a bad thing?

A good question for students of psychology and sociology. I'm certainly not claiming authority, but here are a couple of relevant studies:

[1] http://pwq.sagepub.com/content/early/2011/01/21/036168431038...

[2] http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3777639/