The encryption would take too long. I don't think the data is going to be very useful. Your interception would block the signal, so this would be a very tempo

The encryption would take too long. I don't think the data is going to be very useful. Your interception would block the signal, so this would be a very temporary exercise. They are using the towers to transmit information from the exchanges (already publicly available) and their own transactions (soon to be publicly available). One use for this information might be to beat the low-latency masters at their own game, and act on their trades before they arrive. It's theoretically possible you could design a system which would relay exchange data from the drone at such low latency you could compete with or beat other data feeds for a given location. That would be a valuable commodity, but hard to capitalise on in the short period of time between the drone blocking the signal and the data being re-routed. It sounds as if anyone with the capability to use the intercepted data would do better using their efforts elsewhere.