I like trying jokes and seeing the response, and if I end up doing it in my act, it won't be 140 characters. Twitter is helpful that way to me. It's like a message in a bottle. But a lot of times I think I tweet the stuff I would like to say to teenage me.
I do not see how we can rationally oppose high speed rail because of the environmental and other costs without considering the social and human consequences of the radical elimination of transportation that this entails.