This is Femi with Hipmob: there ARE some privacy concerns we have over this, and as it evolves we expect to add additional notifications and controls. The human operator element does make it more privacy-sensitive, but we looked at it more like a real-time search query submission: most modern search boxes will send the query details as you type in, and show prospective results in real time. Obviously, there isn't a person staring at your search query in real time so it is more anonymous, but that was the thought process that guided this.