Did you say "make" people do something? With an app? Surely you understand the futility of that one. Coming from the world of motorcycles, I'm a bit slow on the uptake for Strava but if the appeal is its "competitive" modes/features (KOM? What is that?) and if that is wildly popular, well, I surmise that your suggestion is doomed. No offense, but hoping that people who use the app won't "cheat" (if Strava users want to call it that) is an empty wish. And, again, I'm not sure an app, even a wildly popular one, would address the question.
Should e bikes be allowed on mountain bike trails? If the answer is 'no' who will enforce this regulation? If the answer to that is the local jurisdiction's law enforcement officers, e.g. park rangers, I suspect that many will dutily obey and just never take their e bike close to the trail, for fear of a fine. But as the market grows, (as it seems to be doing in Europe and from all that the manufactures are pushing at the bike shows) there will be more violations and perhaps some pressure to amend regulations. But, one of the primary points which seems overlooked is the price of entry. E bikes are expensive. They have not yet reached that point where they are getting cheaper either. While China may someday flood the market, that hasn't had much effect on the current crop of non electric mountain bikes and is not likely to affect the eMTB any time soon. All the MTGs get fancier, more technological and.... more expensive every year. Adding electrics just makes an MTB that much more expensive. Which just means, to me, an old man, that your trails aren't gonna get trashed by the e-bike crowd. It won't be us old timers who can afford one slaming down the hills in 'turbo' to scram past the youngsters. We'll be dead soon. Let us have some outdoor fun on the trails. We'll be good, I promise.