Check the Tech Ingredients YT channel.

Tech Ingredients YT channel made a diy microwave directed energy device to disrupt consumer drones.

More like: That could be useful, just not for (perhaps many) drones.

1km isn’t that far - the drones that were used for surveillance of Minneapolis protests in 2020 were around 6km up.

If they needed to get close for some reason, would a 1km deterrent be countered enough by approaching from directly above and using gravity for the last km?

And green lasers

Yep, one of those things the IT department takes care of and most other people just need to know to keep their devices updated.

Copyright does not give the holder control over every “use”, especially something as vague as “using it to undermine their skillset”.

Copyright gives the rights holder a limited monopoly on three activities: to make and sell copies of their works, to create derivative works, and to perform or display their works publicly.

Not all uses involve making a copy, derivative, or performance.