D - Already have answered them myself, as if multiple others would not have already done that.

If they are smart they will take one look at us and run

Well, if they are blabbing, that means that their distance in light years, that many years ago, they were in about the same state of development that we are. There is a brief window during which you will see transmissions from a planet before they go bankrupt, extinct, or their technology simply advances beyond broadcasting. Future radio communications on this planet are going to be lower-power and in small, coded bursts, much harder to detect and locate their source.

Kattosha wrote:If they are smart they will take one look at us and run

Run? They would probably setup a barrier around our solar system to protect themselves.

They clearly have WMDs.