I can see how Twitter may be a step short of publishing (or is it?), but Twitter’s not a like newsroom because those have four walls, while Twitter’s amplification power is potentially very large. Your “newsroom” has 25,000, sorry, *30,000*, people in it. It’s a lot closer to publishing than being in a closed news meeting. And while there was no harm done in the Piers Morgan case, it’s not at all hard to think of some harm resulting in truly stupid cases (bank runs is only one, and there are worse scenarios I can think of) if we applied your Twitter-is-a-newsroom standard.
I like the higher-standards idea for big new organizations, and maybe looser ones for others. Like everyone, I like the freedom to make mistakes, or not be totally perfect, without feeling like someone in HR is keeping track. Twitter does feel rather cozy sometimes, but that’s deceptive. The reason people feel a bit of embarrassment after making a mistake on Twitter is precisely because it’s so public. Embarrassment plays the same role on Twitter as it does in print. It makes you careful, and that’s not so bad.
Hey someone has to wag the finger.