@nino @malerbabomba @blondtradgard Not necessarily. A lot of stuff on the ground is shielded these days. It won't be like the 1800s when telegraph poles caught on fire. That said, it would mess up a lot of stuff.
Better to hack the system and tell all the satellites to de-orbit making them all immediately burn up in the atmosphere. Which, in theory, is a thing you could actually do.