I got a laugh from Valleywag’s article: 10 things Twitter users should not do.  My favorite quote was “Twitter is a heat sink for the unexpressed ego.”  If you are on Twitter and don’t find that line amusing, then it applies to you.  It’s like what Ricky Gervais said about the American version of his David Brent character, “If you don’t know a Michael Scott, then you are a Michael Scott”