I've been on Strava for a few days now. Wow, I'm just glad I'm not the highly competitive type! Every route I go on the end map is awash with segments. There must be literally millions of these segments up and down the country on all types of roads, varying from just a couple of hundred metres to several kilometres.
At the minute because I'm new to it all my times are understandably coming up as PB's to me. I can also see what other cyclists times are on the same segments, which is a little worrying if I'm honest.
I eluded to the fact that Strava rides are open to unscrupulous efforts. But, as someone else pointed out there are some very fast amateur riders. There is no way I'm saying everyone is cheating because that wouldn't be true.
But some of the speeds that i'm seeing, 50-60kph, highly achievable on some of the flatter roads I go on, make me think that some of these riders, just to get a KOM time are putting themselves in unnecessary danger. Pro's travelling at breakneck speed is one thing because the roads are closed, but the roads aren't closed for a would be KOM Strava wannabe.
I suppose without seeing cycling related deaths figures on our roads, before and after Strava became a thing, it's difficult to quantify.