Here on HN there's a regular argument for trains as an alternative to cars. Seeing how I end up using the train once in a while, I'm always bothered by the lack

Here on HN there's a regular argument for trains as an alternative to cars. Seeing how I end up using the train once in a while, I'm always bothered by the lack of cleanliness of public trains and how people come and go, touch things, leave crumbs, etc., and then I have to sit and touch those very places. Planes vs cars is not really a debate, as certainly for many destinations cars don't make sense.