*ENDING SPOILERS* Where SHOULD they go?

At the end of the movie, Shaw uses David to pilot one of the other ships on LV-223 to the Engineer's homeworld so she can ask (with David translating) their entire species why they changed their minds ("they created us, now they want to destroy us"). I can understand her motives, but isn't this kind of a bad move? There are so many variables and risks, for example her arrival would remind/tell the entire engineer species about the 2000-year-forgotten outbreak on LV-223 AND of their mission there to destroy earth which, as such, was never carried out? If the species as a whole wants us destroyed, there would be no way to stop them once Shaw arrives and they ALL know about it. I'm sure they can find the location of earth through some kind of ship tracking/mission logging system in David's juggernaut, if they cant just "extract" the info from Shaw (through torture after learning English from David) or David (by extracting his memory with their smarts+technology) anyway. ...Or they might just know about earth already and are monitoring us all the time anyway (tin foil hat). If this were the case it would prove that not all the engineers want to destroy us anyway and they might be willing to talk to Shaw once she got there. That is if they arent a super militant civilization that will just shoot down any unknown craft that approaches their homeworld before David can even try to communicate with them. That or they would kill Shaw and David and take the ship back secretly in order to cover up the fact that the engineer CIA were making biological WMDs and hide that info from the engineer public. I think that Shaw should just fly the ship back to earth and let our scientists study it using David. We could go forward hundreds of thousands of years in our technology and could learn the information needed to protect ourselves from the engineers, be it by defending ourselves from them with similar weaponry, or by making sure we stay hidden from them for a long time. We could possibly even send back more androids and drop them off on LV-223 to steal the rest of the juggernauts abandoned there.