Would be nice if the dive operator concerned was 'outed'. As dive pros, we have a responsibility to help develop diver sensitivity to ecological issues - in respect of this picture, it seems hugely lacking.
I've encountered groups before who had similar mindsets, but always strove to educate and inform them. Done correctly, it tends to make a difference. Sadly, many of the groups I've encountered who had this sort of attitude were of Asian background (HK/Chinese/Korean). There's obviously something drastically wrong in the scuba educational system where these people are learning. A fact that has been reinforced to me by the fact that their instructors (group/trip leaders) were foremost in encouraging/demonstrating this damaging and unaware behavior.
Likewise, I've also seen a limited tendency amongst more responsible dive operators to 'tolerate' this behavior - or at the least, to turn a blind eye to it - on the basis of not wanting to offend their paying guests. That's understandable from a business perspective - but since when did we become diving professionals and representatives of the global scuba community purely to extract maximum cash from the scuba community, without any semblance of ethical and environmental consciousnesses?