Everything you choose to look at plants something in your head that will sprout months from now. The feed isn't a window with the world going past without touching you: it's a plot where other people decide which seeds fall.
What strikes you today as harmless noise is the idea you'll repeat tomorrow as if it were your own. Attention is soil: everything you let fall into it takes root.
Nobody forces you to eat what grows. But you only harvest what you let take root. Choosing what to look at is, deep down, choosing who you're going to become.