Has an Olympic Hockey (Men) game ever ended 15-1?
Exactly once. On February 15, 1952, Canada beat Germany 15-1, and no Olympic Hockey (Men) game before or since has ended that way. When it happened it was a scorigami, the first 15-1 in league history.
That makes 15-1 the 75th most common final score out of 99 that have ever occurred in Olympic Hockey (Men). One point away, 16-1 has happened 1 times and 15-2 has happened 1 times.