Don't tell! they'd advertise—you know!
Some versions of the poem (inaccurately) give this line as —
Don’t tell! They’d banish us, you know
— eliminating Dickinson’s inventive punctuation and changing the meaning
Far from feeling inferior or unwanted by the masses, Dickinson is making a choice of solitude (she knows that if she publishes her poems she will become a viral meme — but she wants to avoid that!) “Advertise” is a word with an air of modernity as well
Also, she’s not explaining this to the reader. “You know!” is meant to indicate “you already know what I’m talking about! Being relevant to society sucks”
To help improve the meaning of these lyrics, visit "I'm Nobody! Who Are You?" by Emily Dickinson and leave a comment on the lyrics box