I went to university with the Deputy Head at Shore and I don't recall seeing him or Dr Wright in the stand. At Newington, the Shore boys have also been unsupervised as well. Or maybe the boys are just left alone without Shore Staff intervening.
But no School crowd is perfect, your dealing with Boys filled with hormones, that ensure common sense can be a rarity at times. As I said Shore boys by themselves are a credit to their school. The phenomena I am talking about is most evident in films concerning Nazi Germany, where a normally cultured, well behaviour people went off their heads under the emotional pressure directed at them when grouped into a crowd. (No, I am not comparing Shore Boys at Rugby matches, with the Nazi Nuremberg rallies).
By the way,The Newington pitch invasion of 2015 against View serves as an example that no school is perfect. In my experience Scots Old Boys at home, are possiblarly worse. Joeys and View Old boys when under the influence, can also be a bit over the top as well.
Bottom line, GPS Rugby arouses passions in all of us, that can be less than dignified.