Actually, in the R22 once you pass 400' you are out of your "dead man's curve" and an auto from a hover is doable...especially if your landing area is right below you,...and yes I have done them,...well, from 500' anyway.
But as for doing this on every departure from and approach to a garden, (especially as your practice EOLs would have had you poised and ready to react ... and from a climb)?
As for landing, he can easily come in quietly, its a simple technique, someone just needs to show him how,...if he cares to learn?
I don't think the aircraft noise made was the main reason for the OP's concern. It seems to me the concern was more about "rules" being broken.