it would affect purchased drones, but not all diy ones, you would need to add magnetic interference as well. It would not be to hard to make a drone attacking drone to bring any drones down.
The problem with designing any system to combat drones is, its quite easy to design around. Whereas, drone killing drones, is relatively easy and cheap,
for around £ 500, it not hard to knock together a very complex set of sensors and control board that could get a drone from position a to position b and do whatever there, that could not be jammed or confused easily.
but, it would be easy to build sensor arrays to detect any drones around airports and flight paths, and easy to target a drone with a drone and guarantee to bring it down.