Hi Scott (and AoIRers), I don't think 'worry' is the right word. I'm interested in the process of norming these spaces. You are norming twitter right now by suggesting that a certain kind of activity (in-app notifications) is not good for the space. I tend to agree, and also think it is a trivial use of the space. Of course, the "simple" answer is 'don't follow!', but that's often a suboptimal option. Often, I -want- to hear about someone, but I would prefer a higher signal-to-noise ratio. Some people explicitly ask for a higher signal to noise ratio, others complain to a third party ("gawd, she tweets SO much") and others just unfollow. I cannot say which is the right course, but I know that they all happen, and that they are all a part of the collective dynamics of defining and communicating an appropriate use of this medium. I recall a similar form of norming taking place on facebook, but there the issue was "drunk pictures" rather than "what I had for lunch". (OMG, I can't believe he put that picture, up!" or "what will my employer [parent, spouse, kids] think", etc...). In both cases, neither is to be taken literally, but as a metaphor for the kinds of unwanted activities or concerns endemic to that space. Sidenote - what do you (the royal AoIR you) think will be the common complaint about Google Wave, cause we all know one is bound to emerge? Take care, BERNiE