In the end there's really no good way to electronically block against a drone. Someone could preposition some infrared lasers pointed along the expected flight

In the end there's really no good way to electronically block against a drone. Someone could preposition some infrared lasers pointed along the expected flight path and the drone could use those to perfectly navigate to the target. Or a single laser that tracked the drone by scanning the sky and the drone acknowledging when the laser was pointed at it. Or I'm sure a dozen other schemes. Someone willing to spend a year tinkering could come up with a drone that is only stoppable by directly disabling it.