I left school 25 years ago (the fucking horror!).
Bog standard comp in a town in the south. Not 'rough' not 'posh', just pretty standard, in the days before social media (thank goodness). We didn't have mobile phones until we were on the verge of leaving school and those were the first 'pay as you go' type ones that Elton could only ring and text on.
The 'popular' ones at my school were a mix of sporty high achievers and sporty mouthy bullies who were disruptive and not very bright (or if they were bright they hid it well in their showing off). They smoked, drank, swore, had sex, hung around with older 'boys' (actually young men who would collect them in cars at lunchtime, huge safeguarding concern these days!) and smoked weed.
Then we had the middle of the road people (most people, me included), the very studious kids (boffins, circa 1998!) and the children who in hindsight were probably picked on daily (not by me) because they were unlucky enough to be known as 'blue stripe' kids, as in everything that had was 'Tesco value'. Poor, in other words. Some of them weren't very clean/smelled/wore holey or obviously hand me down clothes. With an adult view it's very likely that some of these children were by todays standards at least from neglectful homes. Horrible.
Anyway, the popular kids. The high achieving ones were generally also nice people and actually most seem to have gone on to have nice, normal and successful lives. The more bullying/disruptive types that I know of have progressed as you'd expect. One dead, several addicts, one in prison, several had 3x kids by 3x men by the time they were 20, one has four children all who have been removed from her care by SS, one has EIGHT children the last I heard, by a man that comes out of prison, impregnates her and is sent back down again with depressing regularity.
Makes you think that actually these children possibly had homes similar to the 'blue stripe' kids that they bullied so badly, but with more cash for nice clothes and regular baths. It's generational - their families are like them and their children will be too.
Sad.