I kind of like the concept, it has general potential.

However what is definitely risky/dangerous practice for one pilot, is a normal day, well within safe boundaries for another pilot with a different skill set.

Example: for the type of flying I do, thermalling/saves at the 400-600 ft agl level are not a risky manouver given that I have a landing spot already studied out and within direct reach and having literally thousands of hours of low level flying and turning. For someone else this would be a very bad idea
Who judges whats considered dangerous or not?

How about each pilot submits a list of what their personal boundaries are, then we judge and watch for the times that pilot breaks his own submitted set of do’s and don’t. That could be directly useful. I know I broke one of my own personal rules this last season, no harm no foul but if I volunteered myself to an outside judge they could possibly bring to my attention other unrecognized (to me) instances where I was seen to come very close or break my own safety-set.