I take their music seriously, and I appreciate what it's for (at least for me) - which is catharsis. A release. Let them do the screaming for me. I just found it funny when Corey suddenly brought this kid to the stage at the start of the song. I don't know why I started laughing...it was unexpected mostly. I just found it funny that Corey was singing up front to this kid and it seemed like he was corrupting him right then and there.
I discovered this band when I was well on my way to adulthood, so IMHO I have the mental faculties to put their music in perspective. But what about this impressionable youth (who probably likes Slipknot as much as the next fan) that might not be able to properly digest their kind of music? It's being presumptious I guess and of course the band wouldn't put any age limit on their listenership, but there are some things that need a certain level of maturity and understanding before being exposed to it. I mean, I appreciate what Saving Private Ryan was trying to say, and the graphic scenes are meant to be seen by a mature viewer that can handle it.
I don't really know where I'm going with this, and I don't want to dictate what people should or should not do, but I think a young mind is not quite ready for certain things. In time it will be, but not just yet.