There have been a number of threads on Groundspeak in the last month or so about caches being stolen, and some at least appear to have been deliberately targeted by people using gc.com to get the co-ords.
Some cachers have responded by making their caches members' only, but as anyone can become a premium member by signing up to pay monthly by PayPal, make one payment of around two quid, get all the info they want and then cancel the payments, I don't really see the point of that.
Do not go gentle into that good night.
Rage, rage against the dying of the light. (Dylan Thomas)