I don't believe Strava makes much of an effort to fix erroneous data.
They instead rely on the community of users to police the site. Individual users must crop out their mistakes.
In my case, I saved certain segments known to get vehicular travel activity.
Easy enough to spot and flag. Sometimes the rider goes in an crops out their 78mph 5% gradient segments.
But usually they just seem to let it lapse. Flagging does pull them off the KOM boards.
From my perspective, my interest is to see proper data. Less concern over KOMs (in fact, I've got none!) and more to just see how I stack up against friends and pros alike. Segments around my area is stacked with pro peloton riders, due to ToC and training camps breezing thru. Phinney, VanAvermardt, Craddock, etc populate many sections.
To me, it's sort of like golf (far from my favorite sport): you're playing mostly against yourself, to see how you stack up on a particular round or course. You might even come out even on a par 5 hole, while some pro double bogeyed it in a recent tourney. You're not competing against that pro, but it provides some entertainment value.