I know what you mean Stuart, but I feel you cannot blame those people for not knowing about micros. Most people either have only vague memories, or they have heard from "bloke in the pub" that they have no merit. Indeed my neighbour thought I was nuts to be interested in bubbles and micros, until some Ray and Jenny Dilks in their yellow and grey Heinkel, and Peter Jones in his yellow Trojan turned up in our yard for the London-Edinburgh run. Later that evening Mike Shepherd heroically arrived in his green Goggomobil with a spare float chamber top, as Peter's had fallen off. My neighbour saw these cars in the flesh for the first time and his scorn instantly turned to outright enthusiasm.
I actually think that is part of the fun of having a very unusual car, and when people suddenly see them and get interested I think that is a good thing. Most of us into these things are middle-aged, and we have to get new and young people interested in owning, restoring and using these characterful jalopies, and joining the clubs, and buying their spare parts and merchandise because that will keep it possible for them to be used.
I agree it can be irritating, but just remember you are converting the heathen hordes! Take pride in being interested in obscure things! And when the heathenhordes see these wonders, be flattered at the fact that (at last) they see that you DO have an interesting machine DESPITE what "bloke in the pub" told them!
It's all part of the fun, even when the hordes are a bit irritating!