Most of us aren't worth stalking, or even paying attention to. For most of us, regardless of our stance on privacy, the benefits of finding people to eat lunch with (http://www.amazon.com/Never-Eat-Alone-Secrets-Relationship/d...) outweigh the risks of attracting a stalker.
It's possible that one day we'll get our 15 minutes of fame/notoriety in front of 15 people or 15 million. Then we'll stop seeking celebrity and care more about privacy. Mostly without loss, perhaps with some nostalgia for the good old times.
Don't worry people[1] will steal your privacy; you'll have to shove it down their throats.
[1] Governments and corporations are a different matter.
Then go buy and read this book: http://www.amazon.com/Never-Eat-Alone-Secrets-Relationship/d...
The author comes off as a complete tool, but every bit of advice he offers is pure gold and extremely practical.
In Defence of Food (Michael Pollan) suggests that the cultural labouring over lunch didn't just emerge because it's enjoyable it may actually improve nutrition too.
http://www.amazon.com/Never-Eat-Alone-Secrets-Relationship/d...