Hi Vern,
The event to which Court has mentioned and linked to is this one in a few weeks time.
https://www.ukcyclingevents.co.uk/events/wiggle-southern-rough-ride/ Over here electric MTB's are treated with much suspicion and accusations of cheat. I'm sure that I'll get some of that at the event, but things like that just go over my head. There is nothing in the rules to say that I can't ride, and I'm riding for fun only and nothing else. To me it is purely a social event and a way to unwind. I'm even quite happy for my times not to be counted if it helps to keep the peace.
Back in the real world of riding 'public' forest tracks, cycle paths etc, the view towards electric MTB's is very much different. The majority of people that I come across have never seen one before, and the bike is a very good way of interacting with like minded people, along with friendly chat and banter. The bike often gets viewed with suspicion, but I'm always very quick to offer rides on it, and without fail, doubters come back grinning from ear to ear. When riding, I'm always aware of and respectful towards other riders, horse riders, and walkers. Our tracks are obviously not on the scale that you have, and the biggest issue that I do have is with walkers telling me that I shouldn't be riding where I am. This issue has nothing to do with the type of bike though, and again I'm always polite and never cycle without a map, as this is a very good way of proving that I am actually entitled to ride where I am.
You'll always find people in life that will be quick to moan, and you will never please them. The key thing is that you just remain polite, and don't let others spoil your day.
I certainly wouldn't let the worry of the odd person moaning, put you off buying and using an electric MTB. You may never come across that person, but if you do, just smile.