Man, you know, I have always had a lot of pals in fandom that were ten or fifteen years younger than me, and I never really thought about it too much. I know that tumblr is young, but it's also sort of indignanty ignorant. Nothing has ever made me feel quite so "okay, you have no idea what you are talking about because you are 16 and also not particularly curious so you need to shut the fuck up and sit the fuck down" as tumblr does. It's why no matter how great I think a lot of their posts are, I follow very very few personal tumblrs and half the time I end up unfollowing them. It's like an entire website of 19 year old women blogging constantly about rape culture in the snarkiest most dismissive way possible, because anyone who is not them is an asshole. And honestly, at this point in my life, that is not shit I need to be reading.