If you register with Frappr, you can move your pin anywhere you'd like. That function works fairly well now.
Mith's advice is very good. My pin has never really shown where I am exactly. I fully intend to puzzle any anonymous stalkers out there by continually moving the marker to new locations as they strike my fancy.  
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People assume that time is a strict progression of cause to effect. But actually, from a non-linear, non-subjective viewpoint, it's more like a big ball of wibbly-wobbly, timey-wimey... stuff.
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