There was an article in one of the London papers a while ago saying the usual shit about dangerous riding, cyclists "racing" on the highway etc and it used a few examples from Strava saying about the KOM on various London streets being higher than the speed limit blah blah.
Then a researcher went out and showed how easy it was for Strava to be fooled by GPS errors, especially over very short distances.
I don't think there's ever been a case in the UK where Strava use has been cited in court as cause of an accident has there? I mean I know people post on here moaning about Strava warriors straightlining corners on trails but even that is hard to prove - people have been doing that since way before the internet!
Edit: here it is