Questions Yondu might end up asking around to the evacuees before he asks the comms:

-If the soldiers used the wards, does that mean you don't have to be magical in any way to use them?

-What happens if someone draws a real big ward instead of a bunch of littluns?

-How did the Horny guy survive when he was in there?

(He will rethink this question and state it less stupidly.)

EDIT:

-Was setting off the wards dangerous because of explosions or because people got drained of life or both?

-Have any of the townspeople had creepy dreams/dreams of a big demon/anything subconcious?