This may work - I certainly have no idea whether it will or not - but doesn't it seem strange that rather than try and solve the problem directly they are resorting to the potential 'humanizing' effect of music that is nearly 250 years old? This idea - that great art, particularly music, can civilize and educate us - still holds a surprising amount of weight, especially given the ideologies musical propaganda was enlisted to support in the twentieth century. The theory that listening to what some of us consider to be high art can improve the actions of our fellow humans is attractive, but I am not sure that the reality of art is quite so simple.
Even if this scheme does work (although I do wonder if that might just be because the culprits aren't big fans of Don Giovanni) shouldn't we stop and think for a moment about how music affects our behaviour, and consider the lessons of history, rather than simply leading another cheer for Wolfgang?