And yet when I called corporate to ask wtf was going on, they didn't care. That dealership is still a Ford dealers so clearly no effs given!

Ford doesn't do shit to dealerships. When you have a grievance with one, you realize how little control the manufacturer has (or is willing to exercise) over them.

If some dealership gets sanctioned by a manufacturer for being jagoffs, they'll put up a new sign next week and be a Toyota (or whatever) dealership. The manufacturer knows this and won't alienate them for one customer.