Take it one step further:
I'm the race director of the Hypothetical Marathon, and the most unscrupulous RD in the known universe. My buddy across town puts on the Podunk 5K, and raves about how great it is to have USATF certification. So I ask him a few questions and find out that Bicycle Bob did the 5K for $50. I can swing that to promote my race, so I call Bicycle Bob, but he wants a couple hundred to do a whole marathon. So how much for a 5K? Fifty? Sold. When I get the course map, I go to the finish line of the 5K, get in my car, and drive 22.7 miles as indicated on the trip odometer, paint the road where the marathon finish will be, and use the USATF certification number for the 5K to promote my marathon.
Of course it all goes to hell when a couple Kenyans show up to train and end up setting a world record. Guess I should have changed out that donut spare before I laid out the course. But by then I'm on the plane to Rio anyway.