“Here’s the frustration: if you’ve been on Twitter a while, it’s changed out from under you. Christopher Alexander made a great diagram, a spectrum of privacy: street to sidewalk to porch to living room to bedroom. I think for many of us Twitter started as the porch—our space, our friends, with the occassional neighborhood passer-by. As the service grew and we gained follwers, we slid across the spectrum of privacy into the street. Of course, the things you say on your porch are much different than what you’d say on the street. But if the porch turned into the street without you noticing, there’d be a few painful months before you realized you needed to change how you spoke.”

Frank Chimero – From the Porch to the Street

Don’t agree with all of this, but this is an interesting point I sympathise with.