I live in an area that has a very very vocal minority that believes that cutting ANY tree for ANY reason is a rape of mother nature, and anyone who does that should be thrown in prison for 20 years to life! They even complain about cutting dead trees who's limbs are endangering anyone walking beneath! Of course, none of this is on THEIR property - just on property that belongs to someone else. (For some reason they also believe they have a SUPERIOR RIGHT to determine how everyone else should live and what they can do with their own property!) In the end, their vocal decibels are greater than their IQ.
There are many reasons to cut trees. A tree, like every living organism, has a life span. They sprout from a seed, spurt in growth through their younger years, fill out in maturity, and then start to decline in health/vitality in their waning years until they eventually die. A tree is best "harvested" when it is mature. When it gets "over mature", it starts to rot through the center, weak spots develope in branches, individual limbs start to die and break off, and the "value" of the tree as a renewable resource diminishes. A person trying to manage the renewable resources of a wood lot would periodicly havest some of the trees. But not all trees are at the same stage in a wood lot. So then to be "economical", a range of trees is harvested at the same time. A trained Forester knows this, and advises as to what is best for the trees involved and the land they are on in general.
But in the end, it's someone else's property. If you want to be able to tell them what they can and can't do with their property, then grant them that same right to tell you what you can and can't do in your own home. All rights come with responsibilities. You can voice your concerns, but do so respectfully. You cannot order them not to cut the trees, but they can order off of their property - and to not come back.
Just my humble opinions to share. Take them as such.
Mike Ameling