Nobody here thinks this was anything other than an absolute tragedy, but a sadly familiar trawl through decades worth of accident investigations will show a clear connection between risk taking and the presence of spectators. Unfortunately the nature of the accident will almost certainly prevent the detection of any insidious system failures or cockpit distractions and it will probably end up as another CFIT statistic. The well publicized presence of spectators (some of whom were injured) will undoubtedly remain an unknown factor in this investigation.
Supervision is another factor that looks good on paper until an accident occurs, and only then is the effectiveness fully understood. Some very well publicized accidents and incidents recently have demonstrated that actual supervision was a thin veneer on top of an "immortal" cultural attitude that resulted in unnecessary risk taking. Effective supervision extends from the CO's office to the the most junior erk and changes the entire operating ethos of a flying unit. It's not a common thing.