[pacaro]

I got a different take from the post.

He does take a long time to get to the point, but I don't think that he is trying to criticize the app authors, or Apple, he's trying to make a point about how Facebook and FourSquare make it too easy to over share personal information.

If the information is available via public APIs then anyone could write the App, I think the author is trying to point out that people need to be educated about what the possible consequences of their facebook (et. al.) privacy settings are.

Using this app as a vivid demonstration is quite likely far more effective than a technical or ideological rant about privacy.