What you're reading Paul is a fairly accurate account of things.
On the other hand a lot of people conveniently gloss over the scene of those times, pretending everybody was mates, you could leave your bag or records unguarded etc... all a load of bollocks.
Yes they kicked shit out of eachother on Saturday afternoons... and they'd do it again before the nighter if they got the chance. There was often a reception party at Manchester or Wigan station and if you had the wrong accent or wore a scarf, you needed to look out!
I always thought one of the reasons Cleethorpes was so much more relaxed was that there was no football in the town, whereas in the north west or Stoke or even Peterborough the football tribalism carried on into the soul scene... not necessarily in the nighters, you needed to watch yourself outside before the start though.
I reckon I was 15 when I first went to a nighter, and that wasn't unusual. I do agree with Karen, though, that the perception of drug use is overexaggerated. When it was the material from chemists, not everybody could get it, and when the, erm, custom-made stuff became available some of us avoided it like the plague