I agee Calvin, it's very easy to get on this Forum and point fingers at everyone. The Jandarma are doing their best to deter and catch these thieves. They have brought in extra men and are doing extra checks and patrols which wouldn't happen in the U.K.
One of the reasons they don't stop foreigners is because most Ex pats here can't speak Turkish and so cannot answer even the simplest questions. Most of these Jandarma are army conscripts and don't speak any language which is foreign to them.
If I went into the local Police office in my former home town and started telling them how to do their job I know what their answer would be.
These men are doing the best they can, let them get on with it.