What A
!!
Especially as it's someone related to aviation, not usual nimby.
If it was me, I'd remind him of the gyrocopter incident, get the solicitor's letter ready and record his/their trespassing whenever possible for further action. I'd also let him know that trespassers riding horses can be thrown out of saddle due to engine noise etc.
But then, what do I know? I only had pain in
neighbours in apartment block in the past. I also learned that sometimes non-violent/non-subversive means/solution does not exist with some headcases in various situations. Very sad indeed.
I somehow recall a particular case when murder of 'passion' charge was dropped due to person not acting under 'clear mind'. Amygdala, the part of brain that's responsible for 'fight or flight' adrenaline and other hormones production, is very powerful.
Let's hope you never have to get that far or have accident because of them.