I thought Scott McNealy was over the top when he gave privacy a metaphorical middle finger in 1999, saying, "Get over it. You have zero privacy anyway." Now I'm thinking the former CEO of Sun Microsystems was simply ahead of his time.

I just returned from Demo Spring 2010, a technology forum for hot young startups that usually reminds me of why I love covering our industry. But Social Sentry, a new product shown at Demo by a company called Teneros, is frightening and represents a threat to privacy and the open use of social networking. The scary application reminded me that technology does have a dark side.

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