Its plain stupidity, and in many incidents the acts will be immitated or matched by some kids who in their own stupidity will injure or worse kill themselves.
However, not sounding like I am going to have a 'snakes hiss' on your campfire, I did see a pirated copy here in Shyteland, and I FF'd through most of it. I did catch the horse scene (not my cup of tea - ha), and I did laugh at the rocket and the torro teeder-totter bit. The branding of one's arse, and the fart helmet, well, just adolecent crap, and with the helmet, literally. I give it an overall 1/10. Don't waste your money. A $2US pirated DVD copy was not my investment, I just borrowed it.
Cheers,
Wes