Yes, you are encouraged to slam on your brakes at least once a month to get the rust off. I live on the west coast (rain but low humidity and hardly any snow), so its less of an issue.
First read your owner's manual to see if it says anything about this.
My EV for example has a brake cleaning mode that turns off regeneration for approximately the next 10 times you use the brakes.
Using that is probably going to be safer than slamming on the brakes.
You'd think with all that electronics it would be smart enough to use real brakes every now and then. The plug in hybrid Prius runs the gas engine every 100 miles or so.