I believe you misinterpreted my analysis. I am merely suggesting that there is not enough context given in the video to sufficiently judge their conduct. For all you know, they live on a twelve acre farm, and that roadway is merely a deserted access road. In addition, how do you know that the video was not intended to be a satire? I am quite sure that in your lifetime you have done something that you thought was funny just to amuse yourself. Furthermore, the parents could have been right behind them, we just don't know, (unlikely, but it's possible).
I will say it again, I think they are pretty ridiculous for doing what they did, but we are not in a place where we have the right to judge them in any way.
You are absolutely right about the last part, and I am saddened by that immensly.