Earlier quoted context omitted.
I already play with urls that have possible id's in them out of habit. The only difference here is the poor kid was on a gov website and they did not want the information he found to be public. ( Or like in the USA he might have to pay for each document accessed. But I feel that should not result in a raid to his house.) It is a shame the kid was their target and not a google bot like you said.
> I already play with urls that have possible id's in them out of habit Do you jiggle door handles out of habit to see if they're unlocked? It's antisocial behavior. If you were supposed to have access to that document, it would be accessible from a link or search box on the main site.
The kid got documents on a public facing server. He did nothing wrong.