Wifi blocked during a parade? So no streaming? No ability to use chat apps etc while there?

Kind of interesting. I've never experienced wifi blocking at all, anywhere, including during parades and when I attended the London Olympics. I'm pretty sure I've experience cell towers being shut down temporarily a few times though, mainly during protests that got kettled.

I mean shit, a drone doesn't need any remote control, if it can just get GPS that might be enough, and i doubt they're jamming or spoofing gps. Though they could.

Someone would need the exact location of the podeum that a target would be standing on and an explosive large enough for any margin of error for this to work. I don't think it's realistic. I do think this was used to disrupt a british airport once though.