yeah and on 9/11 they had to fly right near the twin towers.
It can't be that hard to shut down drone frequencies seeing as how they have gear to shut down cell phones (to prevent them being used to set off IEDs).
Plus, how long would it take to get signal jamming equipment to the runway? Can it be used safely around an airport? Etc, etc. Novel-research stuff.
If you had reasonable battery life, and on-board independent flight capabilities, then you can probably play tag with the staff all day all night.