I’d agree if this was the first time bad behavior was uncovered. And it’s not just FB, Silicon Valley seems to have a big problem with big systems that, like Frankenstein, escaped the intent of their creators and fell into this algorithmic evil maximization trap.
This is probably the first time it's being reported in a meaningful way that their system enables targeting children for illegal products (presuming vaping is illegal in Australia or the United States for those under 18, which is a separate question, since the only one that passed looked like a vaping product if I understand what I saw in the article)