I believe they finger scan you for a residents pass. The first time you go through the gate, you will need to show your FLORIDA drivers license and get your finger scanned. From then on, to get through the turnstyles, you need your finger and your pass.
WDW has caught onto the friend in Florida trick and taken measures to make sure it doesn't work. I wouldn't be surprised if they ask for your license at check in at the resorts as well.