There's a circuit I occasionally ride. It's just 0.6 miles long, in a business park that is almost 100% deserted during the weekend and at nights, the road surface is excellent, and the corners are wide and safe. A crit is run around this circuit, and quite a few crit racers use it as for training precisely because it's safe and fast.

So I rode a few laps today, and it would not show me my (lowly) position on the leader list because...
"This segment has been marked as hazardous by someone who has ridden it on Strava. Leader lists are not shown"

WUT ?!?