We had problems with conifers over growing on height,complaints off neighbours, so the wood choppers cut the tops of them,but that made them grow out, so they blocked the car park,got complaints off neighbours, so got them cut back and that showed lots of dead inner wood, , we then chopped them down, and the neighbours complained we had taken their privacy away.
We pointed out they could palnt replacement trees on their side of the fence, but that seemed to to be to simplistic an idea for them and they never did.
Oh and theyre a very high fire risk, should a barberque cinder accidently come into contact with a dry bit of the tree droppings. ora a watering can full of salt and water to get rid of snails usyually helps the conifers to extinction.