Thanks, everyone, for your responses. The reactions that this jumper received after this last incident seemed to have struck a chord with him, and it's this that makes me think that he'll eventually realize that he's got to calm down. A few of the local jumpers, too, have told me that they're no longer willing to fly with him until his actions improve, and that's a start.
What I don't want anyone to think, however, is that this jumper is heartless, or callous, or is being purposefully reckless. I do honestly believe that he just doesn't know what he's doing, and that it's his inexperience that's leading him to take certain risks that he can't yet handle.
Part of the issue, too, is: How much risk should we allow him to take, and at what point during his progression as a jumper? Different people are willing to take different levels of risk, and everyone has their own degree of risk tolerance. This jumper has always been a risk taker. To be fair, to some degree we have to allow individuals the freedom, within certain reasonable bounds, to take certain risks; it is, after all, how progress is made. But this guy, though deep down he might not mean to, has crossed the line.
I feel that it's on us, then, as his skydiving peers, to teach him to take the right risks, for his ability and experience level, and to teach him to wait until his ability and experience improve before taking certain other, more dangerous ones. And, after this last incident, he definitely has to learn that there are some - like those that endanger other people completely unwillingly - that he should never take.
I just hope that, if he wants to be a risk taker, that he can learn to do it the right way. And he certainly can't be endangering anyone else in the process... ever.
bsbd,
ben