>>2151As far as I know, there are only three shotacon anime: Pico trilogy, Natsuyasumi, and the third one with extremely forgettable title. When there's so few of them, you gotta appreciate them. When the "meme" started, there were many real perverts on /a/, who genuinely liked shotacon. So it became a default recommendation and a newfag/normie filter: if you watch Pico and like it, you're one of us, if you don't like it and consider it "trolling", you're not one of us, you're just a normalfag.
Later various redditors and god knows who else, picked it up as a joke, without any understanding of its real purpose. So when you see it being recommended now, especially outside of imageboards, that's normalfags trying to be funny. When you see it on imageboards, most people here actually, seriously like it.
So if you have even the slightest passing interest in traps, or shota, or even simple dickgirls - watch Pico, and you may find yourself liking it too.