WWW helped an old-schoolmate find me

An old schoolmate found me via Technorati, Google and Flickr. Thanks WWW for indexing/syndicating/storing all relevant (and irrelevant) data (blog posts, feeds, photographs, comments, mailing-list archives etc) about me.

I kept wondering how my friend got my primary email-id? it's not trivial but determined-person can know it. I am lately very concerned about privacy.

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