i think Dark explained it all well. May not be to everyone's taste but that doesn't mean it is wrong.
Actually, after the thread was posted yesterday, before the picture was approved i went to the other site i thought you might be referring too and checked out the pictures. This one, in comparison with a couple of the others you had, seemed the tamest in some ways. There are dangers in everything we do in BDSM... it wouldn't be "different" if there wasn't. As long as those are recognized i don't see any offense as to it being taken or posted. Once more a personal preference maybe but nothing past that.
As for me... i enjoy breath play, but, the picture disturbs me simple because of the noose. The noose to me doesn't represent submission or edge play but a sense of desperation, dispare, and depression. Feelings i do not enjoy and certainly don't want to associate with my submission.
The picture is obviously professional though and on that level, the black and white contrast with the red scarves, etc. i can see the beauty and such in it.
As to the exact question...
i do not think it is irresponsible based on the assumption that safety measures were taken. As to the "bad taste" once again... a personal opinion on their part. i don't see anything wrong with i as obviously there are some people who enjoy that...I would like to know if people feel the photo shown depicts this in a manner that is irresponsible. One of the people who viewed the photo felt it was in bad taste to have even taken the photo.