firmly plant this.

That’s weird.

She’s clearly means, “that will put us on a slippery slope.”

Does “firmly planted” mean that we’re REALLY on a slippery slope.

Or does it mean that we’re RESISTING the slippery slope.

Or does it just mean that her brain is firmly disconnected from her tongue.

She was clearly against allowing the government to keep tabs on the book-borrowing habits of random people without cause, and especially the part where she, as a librarian, would be compelled by law to cooperate with this. The implication was that we’d be stuck sliding down the slippery slope to Big Brother Government.

Now maybe she was being playful, like people who say “deja vu all over again”, but that’s being pretty generous. At any rate, it’s a rare thing when a mixed metaphor jumps out and punches you in the face like that.