I was watching my ‘49ers fumble away their playoff hopes when my nacho-soaked brain made a strange connection. It was the moment when, following the second of two glorious touchdown catches, tight end Vernon Davis jumped on a podium, posed for the adoration of his fans, and promptly earned his team a penalty.

This banal example of self-promotion reminded me of an AP article in Sunday’s Trib. It was a report on yet another disturbing trend: people posting videos of their criminal acts on social networks and sites such as Youtube.

I’ll admit …

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