How to deal with dominant neighbour

[ElatedBrickFish]

We live in a very urban area with small gardens and a significant turnover of residents. We've lived here 5 years and get on very well with our direct neighbours (share keys, bring shopping when ill, sort bins etc).
Our garden backs on to garden on another street. A couple of years ago a couple moved in with a baby, which is now a toddler, and they've had a new baby. They're the only family in the area which is mainly older singles / couples.
They have a trampoline, they have large and loud windchimes, they have regular late night visitors. All of this is manageable, but they have now started hacking at plants growing against the fence. They have cut back a honeysuckle over a foot away from the fence (I was careful to place the trellis away). They have now complained our fruit tree - which was here before us and them - is dropping in their garden and getting fruit on their trampoline.

1. The tree was here first
2. We don't mind if they cut the tree to the boundary (but they have history of cutting way beyond this)

AIBU?

Cut your tree back to your boundary. The other details seem irrelevant IMO.

Surely if they don't like the tree, it is up to them to cut it back, not us? It isn't a huge tree at all. I'm far more upset they destroyed our honeysuckle, that's the issue at hand

I'd get someone out to trim the tree back properly before they can ruin it.

People get weird over trees - I'd personally be delighted to see a healthy fruit tree!

Honestly - the neighbour needs to suck it up and deal with it. I have neighbours who planted Lleyandi on the boundary of their property - instead of replacing a 1m chain link fence with a 6ft fence to preserve privacy.. The result for me was that Lleyandi sucked out any nutrients from the soil and nothing survives in the soil on our side. The Lleyandi is dying from the bottom up, we can see it from ourside. We cut the over hang on our garden - they aggressively complained and threatened my son at the cutting. Bottom line whatever you do - they will complain.