I'm a fairly private person so I'm not going to post up exact details of why they are annoying. I actually found out who one owner was and know they were filming. This most recent time the drone could not be operated within a line of site and did not have land owners permission to fly over most of the land it did. Past history of the site means I am wary about the reasons for the drone.
I genuinely appreciate the point of view of someone flying one. However, I don't see how the laws actually prevent illegal flying in any way. What can I meaningfully do when a drone is braking the law? If I spot a drone doing a survey and they haven't told me how do I know who is operating it.
As for the CCTV, that is a bit of a side track but I understand you at least need to follow GDPR rules but that might be best for a different thread.
A fair question. Where and whom you would report it to.
But then again I can see that as displayed above the general public simply don't know the actual 'true' rules of what is legal and illegal drone flying so there would be spurious and multiple reports of people feeling irate over Drone flying in their vicinity and a " well, its just wrong!! " mindset flooding the telephone lines of whatever organisation is tasked to ensure Drone pilots follow the regulations.