Yes, the guys are acting pro-actively and dont fear we will ask them questions. I dont get some of our members fears of talking to RB. To not "shake the stinger's hive" or what? Why would we be afraid to talk if we think we are no less witty and cunning than them and actually can outspeak and benefit in words exchange? Anyway.
That one is easy. We tell them that we already have decent map of the world and we dont need theirs.
This way, we refuse to give ours and we dont say: "We wont give it".
edit: I saw that even you Sommers advise to not talk to RB at all
Thinking more on it, I think you come from the wrong conclusion that somehow making RB suspicious will make them to hurry Taj and beat us to it. Rest assured that they will do ANYTHING it takes to get it without us doing or saying anything. To make it clear, we have everything prepared to beat them and there is hardly something they can do to get it before us (if they dont have pre-chopped 13 forests in the dark.)