don't worry about it,
the responsible things to do, is nothing. i had a two kids laugh at me in my micra cab, i looked at them long enough to know they were laughing and then just carried on. no wheel spinning or engine revving.
show that you are not a chav and you can be adult by driving your car properly, maybe even take an advanced driving course. the roads are for getting from A to B, and nothing else so don't race or rally on them, its not fast and the furious, you don't have nitros and 24 gears.
having said that, in my experience, leaving them for dust works pretty good! also if you go down twisty lanes, and some audi is riding your rear, its really easy to loose them they just cant keep up round the corners.
and if things get really bad, like one time i had some guys stand infront of my car to keep me there so they could laugh at my car (again the cab) hit them with something, i keep a bassball bat in the car, if you get a clean shot at them then they run off pretty fast, or lye on the ground twitching.
but its all in England, i have come to sweden, people love my car, there is no such thing as a compact convertible in sweden, everyone has volvos. the speed limit is 45mph, so overtaking and outrunning people is easy. the traffic calming stuff is all islands in the middle of the road, and my car goes round it great, better than a volvo thats for sure!
when people take the #### out of a micra, there are many reasons, some are jealous (like the kids on the mopeds) some just don't understand, (their nan's brown 998cc VW polo won't beat a micra wtf!) and some people are just born #######s, they remain #######s when they buy BMWs or Audis, some even hold on to their ####### ways right up to having people carriers full of kids, great example of parenting.
bottom line, don't worry about it, drive your car and enjoy it in the unique way that one MSC members can, do nothing to the other people because you KNOW you are better than that, you can look beyond the stereotypes and see the good in things which is why you like the micra.