Re: Fight fire with fire?
If we calculate the way that people often do when there hasn't been a recent disaster, we can answer that question. It would go something like this:
The closure of Gatwick cost £50M. That has not happened again in seven years. If we only put teams at the busiest 40 airports, that's £179k per airport per year, which for a 24-hour service means an expected hourly benefit of £20.38. If it costs more than £20.38 per hour to hire staff and equipment, then it's not worth doing it.
Which is not the right way to do this calculation since it's not considering actual risk. It's a very common way to calculate it because it is much easier than calculating actual risk and the people doing it feel like they're being cautious because their calculation assumes that the disaster will happen right now when they know the next one is likely quite a way off. If the next version of this is likely to be a lot worse or if the chances of having it are higher, then the benefit goes up and the comparison changes. However, the "can we afford not to" approach is not any better. It prevents the important work of considering approaches that might work better, be more efficient, and whether we need to do this in the first place. Lots of bad policies have gone into place because a problem was scary enough that it escaped the "not my problem right now" period into the "we must do something, this is something" one.
Not only do we not have a good estimate of risk here, we have no idea what it would take or if it is even possible to build a team as described. How feasible is a drone chase squad? How hard is it for attackers to send up a lot more drones so the chasing team can't chase them all? How hard to speed up their drones so the chasing ones can't catch them? How good is the information they would use to try this. When the chasing drones catch up to the interfering drones, what can they actually do to them to stop them being around; they generally aren't equipped with high-strength butterfly nets or machine guns, and neither could be feasibly attached to anything even slightly cheap. A cool-sounding solution doesn't mean that it works or is achievable.