@Riot: Could you make a mandatory brief course in how attack itemization works for adcs?

If I see one more adc player build Berserker's or a Zeal before building a single scrap of Attack Damage other than their Doran's Blade, I'm going to make another angry topic on this subject! >:(

But srsly, how is it that the class that's most reliant on efficiently using their gold is also the class most-prone to horrible build decisions?