Thanks!

Isn't the entire series about playing with disreputable genres? Why not the "Just Say No" anti-beer ad genre?

Exactly. Buffy isn't perfect on everything, but there are a few common criticisms that seem to completely fail to understand what the show was even trying to do - this being one of them. "Buffy not only does preachy anti-drug episodes, it does them so badly you'd almost think it's parody!" Um...