Oh come on. I have your answer: because this is a nice controversial title to post a blog under. Answering your specific points: 1) Timezones: there's people

Oh come on. I have your answer: because this is a nice controversial title to post a blog under. Answering your specific points: 1) Timezones: there's people posting on Twitter 24/7, yet this is perhaps your only half-valid point... Yes, if you're in a different part of the world twitter might be hard. But there are plenty of people in your part of the world on Twitter - try following more of them, or accept that people in a different part of the world will be less likely to post in your timezone. 2) Tweetie and the Twitter website both support this. Click on "in reply to" in your Twitter feed. 3) That's what ReTweets are for.