Scar someone for life and they'll never leave your side.*
  Brilliant marketing. Disney has always been a very strong
  supporter of subversive programming. Their movies and TV shows
  throughout their history are full of them, generation after
  generation. I give them credit - truly an amazing feat. Gravity
  Falls is top-notch stuff, especially the shockingly realistic,
  nightmare producing images they produce on occasion that get
  burned in the skulls of millions. Scar someone for life and
  they'll never leave your side. Brilliant marketing. It's an
  intelligent show though, and that's what I like about it. It
  doesn't say, "HEY YOU'RE STUPID - WATCH THIS CRAP" - it's
  actually good. Amazing World of Gumball, Adventure Time before
  it among a few others, fall into this category as well.