These lads are no more that 14. They always appear in white shirts and short trousers, white ankle socks, and surly expressions. That alone proves they're 14. They completely dwarf the rest of the Thai population, outmassing them by oh, I'd guess 20 percent. They're everywhere and I hate them. I envy them thier youth and their size, but NOT their dress sense.
Some examples: (More to follow)

No normal humans here to give context, but believe me this guy is immense.

This particular specimen is head and shoulders above his peers, meaning I had to "Peer" around him (guffaw) to have my usual view of the rest of the train...

This one can't even be captured on one image he's so large. Good example of the lower-leg-fashion-disaster though.
I honestly believe that in 20 or 30 years there will be no small Thai people any more, and I for one will miss them. Anyway, I'll keep snapping these guys and we can maybe start a campaign to get western food OUT of Thailand....