Earlier quoted context omitted.
Knowing your BATNA is critical for negotiating anything, including employment. One of the best ways to accomplish this is to avoid shopping for a job when you’re unhappy with the one you have; when your best alternative is “I keep working at the place I like with the people I’m on good terms with” it’s far easier to start from that no and let yourself be convinced.
You can always bluff. I don’t think people do this enough! I mean a shit job is still a BATNA, and you simply don’t tell the next guy you hate the job. Which is as good as you loving your job and “just dipping my toe in the market” from a negotiation point of view.
But you're right, and I've done that myself. Where I hated a job so badly and just pretended and smiled as much I could until someone hired me out of that situation.