Originally Posted by ksryder

If you create a segment Strava will go back retroactively and find everyone who has ever ridden on it to populate the leaderboard. As far as I can tell, it will give someone a KOM but it won't notify them that they got a KOM. Then, if someone later takes it, that person will get a notification that they lost a KOM they didn't know they had.

I've had that happen with KOMs way out in the middle of nowhere, where it's literally like me and one other person who has ever ridden it (and also been on Strava.) Really, that's the only way I get KOMs anyway.