Should one be able to trust people in one's own local church to stand in prayer of a need without it becoming fodder for gossip?
Of course.
But, unfortunately, there are untrustworthy people where ever one goes, including fellow church members. Since any give church is made up of very flawed people, it's best to develop relationships and see who is trustworthy.
One advantage to a forum like this is, even if someone were to gossip, the impact of the needing believer would be minimal...(however, the judgment on the gossiper would be the same!)
But I hear where you're coming from Whiteshield... way too often the "prayer chain" becomes the "grapevine"... it's sinful and it shouldn't happen, but it does.