Barring personal safety, I always make sure to wave back at the kids. I don't care what people think. The fact that kids are getting excited about a car is just awesome! All, or most, of the cars made are cookie cutter style. Supercars are out of 99.8% of everyone's reach and are made of pure unobtainium.
The M3W looks like a kludge of motorcycle parts, WWI aircraft body and bad attitude. Kids love it!
I fell in love with a Morgan Super Sport used in Blake Edward's film "The Party" starring Peter Sellers who drove up in one in Hollywood. It was probably his. I later saw it in Hollywood and just lost it. I must have been ten or so.
We have to pass this on! Wave!