Speaking of radio... one of the water protectors has been flying a small drone with a camera to try to monitor the pipeline progress. He explained that sometime

Speaking of radio... one of the water protectors has been flying a small drone with a camera to try to monitor the pipeline progress. He explained that sometimes this was difficult because he would lose control when the drone was within a small-ish (10-20m? maybe?) radius of a specific building or work site. The drone was programmed to auto-return if it lost signal, so the operator was usually able to regain control a few seconds later. Does anybody know what legal status is for jamming? I believe the FCC usually considers interfering with other transmissions to be some sort of violation, but it's been a very long time since I studied radio law (my amateur radio license expired >20 years ago).