In light of the whole surveillance issue, how to approach the matter of foreign balloons drifting in and out of the airspace of many different countries? Can th

In light of the whole surveillance issue, how to approach the matter of foreign balloons drifting in and out of the airspace of many different countries? Can they steer around countries that want no part of it? It doesn't take too much imagination to envision balloons doing things like taking high-res photos and videos, collecting all manner of signals from communications equipment, radars and other military equipment, or even carrying onboard weapons. Basically the same things drones do. How can they assure skeptical people and governments that these balloons aren't carrying something extra in addition to their statued misson?