I took ds2 to the open day at our local comp (the one whose pupils beat up ds1 once while he was waiting for the bus) and I certainly didn't have to say
anything to put it down.
At one point, I pulled him to one side of the stairs just in time to avoid being knocked off his feet by a boy, who we'd witnessed in a fight on the landing, hurtling past us.
Ds2 is rather small for his age and not particularly brave, so this was enough incentive to get working
I am aware that teachers and staff at this school work very hard and that many pupils will be happy there, but to be fair I don't think my ds2 could have coped. He has not been to Primary school in our area either and has always had an 'academic' personality.
That's why I showed him that school, so he could realise the choices that he was making.