It's just chicken meat, ground up. They don't put the "whole chicken" into a blender, that's false. It's just the same as buying "ground beef" or "ground turkey" when you get down to it.

http://www.snopes.com/food/prepare/msm.asp

I have no problem eating ground chicken, in McNuggets or patties or whatever. It'd be a bit hypocritical of me to eat ground turkey or ground pork, or "god forbid" hotdogs... and whine about ground chicken.