It's all a matter of perspective and knowing the situation. Most 16 year olds i know would love to see a stripper. I know of a mother who let her 14 year old daughter have male friends sleep over in her room with the door closed.
It realy comes down to the maturity of the people involved and how developed they are both emotionaly and socialy.
I wouldn't do it to my son, who is 16 next month, as I don't beleive he would be mature enough to handle it.
However I know other 16 year olds that are more mature than others. I even know 18 year olds who legaly can go in an 'adult entertainment venue' but are not emotionaly or socialy as mature as most 15 year olds.
I think the parents used very poor judgment, considering that doing that was illegal and should have been obvious with some thought. But I don't think its disgusting because I have no idea about the details.
Also note that the media's view of the details will always be distorted to create the most reaction (specialy if its a moral indignation reaction) because it sells better.