If I understand correctly, your BL double honk on exit with key was already disabled and you believe they do not come from factory that way. If that is correct the explanation is the 25 sync 4 has an option to turn of the double honk. I found it in the settings. Someone at the dealer probably...
I just got a new 25 Badlands. Coming from a 22 OBX. I noticed in the 25's settings on the Sync 4 that you can turn off the key outside while running Double Honk.
If you like the grill in anyway and don't want FORD across it you can buy a aftermarket one from goodmatchup.com and put your BRONCO lettering on it or any lettering you want. Oracle sells all the letters in the alphabet. I have an OBX which I think is the ugliest grill they put on the Bronco...