Nah... They're dumb, all right, because all dumbass teens say their misbehavior started out as "a joke."
But I guarantee you that even the first set of arsons wasn't "a joke" at the time. They were all pissed about churches, or something, and now they're being typical dumbasses trying to downplay the seriousness of what they did.
There are two long TV news stories at this link. Apparently Moseley is the son of a Constable for Jefferson County, AL. The plot thickens. The stories are worth watching, and there's supposed to be a press conference going on right now, but I can't find a feed:
http://www.wsfa.com/Global/story.asp?S=4602098&nav=menu33_3