You mean this: "In those days it was pretty well impossible to obtain drugs at school, while today it's almost normal"? There's no "posture" there, just a bald statement of fact.
The tone of the article is that it is tolerated, tacitly
I detect no toleration, tacit or otherwise, just the fact of increased use.
Lastly, isn't it possible to dialogue politely, even when you disagree?
Yes it is---but the impoliteness started here: "Sounds pretty laissez-faire there, though, for those who think that's the way to go."