Really?

I was at Winterfest last night--it was pretty lame. The DJ, for some reason, kept playing songs that the crowd wasn't really responding to. People stood around for the most part.
Now, the reason for the title is quite shocking. So there I was, just dancing with friends, when I saw them. There was this...couple [for lack of a better word] and they were "dancing", if you could call it that. The act was so outrageous that people were gasping and pointing at them. This "couple" took grinding to a whole new level. I will not go into the details, but they were pretty much having sex on the dancefloor.
The only thing more shocking than their lack of shame, is peoples reaction toward it. Most guys were literally craning their necks to see, then encouraging the guy to keep going [REALLY?!]. Most of the girls had a look of disgust on their faces; I don't blame them, it was over the top.
This got me thinking, will this become the new standard dance act at these dances? I have no problem with grinding, because everybody does it. Its suggestive, but harmless. There probably be limits though. Try to keep it from being live pornography please!