Many of us who are using Facebook with relation to caving (and there are many), use it as sort of a scrapbook or photobook to share with other cavers, and possibly unrelated "friends" or family that we have allowed. Switch off the allowance for Facebook's advertizers to use photos. Its useful as we can have folders for specific cave projects as well as links, documentation. Would never put cave locations on line however. To each his own, i guess.
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