I try to “follow” as many prediction market people on Twitter as I can (click on “following”), but I had to unfollow these 2 persons because:

- I like Jed a lot, but he often tweets about his private life. I wouldn’t mind, but the problem is that I follow 70 people, and if they all start tweeting about what they had for breakfast, then it becomes Hell on Earth to use Twitter.

- John Delaney is sometimes interesting, but he re-tweets the InTrade RSS feed, which I am already a subscriber to in Google Reader. That is infernal to see 2 times the same info. To add salt to injury, the InTrade RSS feed always re-publishes a second time their feed items. I don’t know why they do that. It is really annoying. So if you subscribe to John Delaney’s Twitter feed, who re-tweets the InTrade feed, then you get the same thing 4 times in a row. It is the craziest thing I have ever seen on the Web. Plus, John Delaney now uses a script to follow every person who follows him —a standard tactic used by the Twitter spammers. It is a bad thing to do.

Addendum:

- Felix Salmon and Tim O’Reilly make a good usage of Twitter. And Felix Salmon is smart enough to poll his people about his Twitter usage.