Some Mysterious March - Erm - 'Eccentricity'

My somewhat strange and deeply religious neighbour has recently been randomly lopping off small branches from his hedge and laying them 'lean-to' style across the ditch alongside the road.

I have no idea what this is for. Initially I thought he'd cut them but not had time to clear them away, but they have remained there for the last few weeks, so I guess they're where he intends them to be. But for what purpose? I wondered if it was to stop leaves etc getting in the ditch and damming it up, but frankly the branches themselves seem to be creating something of an obstacle. I decided to wait and see.

However, I have today discovered that he has also been randomly lopping bits out of my hedge. Some he has thrown into the ditch (so much for the 'stopping the ditch from getting blocked' theory), and some he has left poked back into my hedge.

I only noticed because a rather large branch of blackthorn had toppled out of my hedge and was partly obscuring the road. When I went to move it, assuming it had blown down in the recent strong winds, I found it had been neatly sawn off and then propped back upright in the hedge.

I don't think he's been attempting to do me a favour by sneakily trimming my overgrown hedge, as some bits that obviously need attention have been left alone. And the bits he's cut range from smallish twigs about a foot long to largeish branches about 6' in length. Ash, hazel and blackthorn as far as I can see.

I am mystified. Is this some strange Welsh custom I've never come across before? Has he completely lost the plot? Should I be worried, flattered or outraged? Am I about to be initiated into some dark secret of country life, wooed, or burned at the stake?

Anyone got any ideas??