I think excusing him just because others do the same makes no sense whatsoever.
Do you excuse killers because other people have done it before? And lets face it, it is out of pure luck no one died here. You can see form the damage on the supe that if it had connected with a person in any manner they wouldn't be around anymore.
Yes he has a supra, yes he's one of our members etc but if this was a guy on another board I'm sure he would have been condemned by now.
I do have some sympathy under the circumstances in which it happened, i.e. showing off the car to others etc. But come on, Chris Webley and Costas were there, in there huge power machines, you don't see them doing this kind of thing.