I liked this one a lot, although it at times felt unfocused. I might have preferred more of a central plot, as I could not help but compare this story to "Rope" (play, and later a Hitchcock film) which likewise concerned young, sociopathic men forming a group.
I also think this was one of Alistair's rare misses with the closing commentary. He was overly concerned with bullying and fighting, when this was a story about neither. Yes, those things happened in the story, but the story was a larger picture of violence and sociopathic behavior. Its frank portrayal of such issues reminds us that these individuals live amongst us.
Alistair also concludes that Brian and Clyde fight in order to "fit in" which I also think is an erroneous conclusion. Brian and Clyde fought and committed violent acts because it was in their nature to do so - not because they wanted desperately to be part of a group.
Some people want to fit in, they want to be part of the herd - and yet it can be a titanic struggle for them. Those who struggle in such a manner tend to see human interaction solely through that lens. Watching everyone else "try to fit in." While I think, in truth, some people never bother trying to fit in. They cluster together in packs to commit violence, but this is incidental. For Bryan and Clyde, it is the violence which motivates them - that they found each other was just a bonus.