I came across this image while looking for diagrams/illustrations of the back muscles. Now, I like strong, athletic women, but there does come a line that maybe shouldn't be crossed. I can't define that line precisely, but I think this is a case of "I know it when I see it." I can accept that there are women out there with bigger arms than me, but having arms twice as big as mine and more ripped than most serious gym going, weight lifting males... well, that's just (IMO) plain unnatural.
Those arms are more buff than even the bearded lady I saw in the gym while I was at school in Chicago. Again, I thought it was a little weird seeing a woman with that much facial hair and stronger than all but 2 men in the gym. But I chalked that up to it being the University of Chicago since it's not a campus known for its physically strong student population. Anyhow, kudos to the women driven enough to get this strong, even though the physique looks disturbingly wrong to me.