It isn’t that simple. Gone are the days when this code was misused by everyone and his dog. Fortunately, it should now only be possible for those legitimately entitled to use the code. You should now get a popup when searching with the F&F code that says:

Before booking this rate, please note that the eligible Team Member must book rate using a brand or Radisson Hotel Group email address and the reservation should be forwarded to the friend/family member. If booked by friend or family member, a Friends & Family Rate Booking Form must be completed and signed by the eligible Team member and presented at the time of check-in by the friend or family member, along with a picture ID (driver's license, state ID, etc.). The form is available via Connect, RezPortal or from your Human Resources Department.