Has an AFL game ever ended 28-28?
Exactly once. On July 9, 1898, Carlton and Melbourne drew 28-28, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 28-28 in league history.
That makes 28-28 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 29-28 has happened never and 28-29 has happened never.