Oh… drones are a really devious idea. You can imagine all sorts of political messages that someone may want to leverage an event like this to broadcast.
You could sneak a heap of something like this into any big concert venue pretty easily:
https://www.aliexpress.com/item/1005004496779816.html
open them up and switch out the visible light LEDs for modulated IR ones, add a tiny microcontroller to send pre programmed data. Get you and a dozen friends to launch them all at the same time...