...so all in all...everybody now knows about the dangers of what I shall call QUATERMASS AND THE PIT in relation to stadiums/concerts etc....and security services are now taking action...to stop ill cult downloads...that sort of thing?

https://en.wikipedia.org/wiki/Quatermass_and_the_Pit

I might have got the wrong episode/series here...but anyway, the one where all of these young people in various 'new age/tribal' costumes...make their way to a stone circle - within the countryside... in order to be drained of energy and then incinerated...having believed that they were on their way to some 'special rite'....