Quote from RedDuke:
I was at a mall the other day, did a check in, then got a call from my friend who was there as well, and whom I have not seen for a long time, we got to meet.
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It also allowed many others to see that you are not home. Geo location will be a huge security flaw in the future. Add this to that fact that people post there favorite sports teams, foods, places, etc. and passwords are now easier to crack then ever. No need to worry about government tracking and cameras being placed everywhere.