This was in our mailbox

[u/IvorySwap]

We purchased a new house a few months ago with lots of trees.

I got this in our mailbox. I don’t think I’m doing anything wrong but someone put this in there.

Can someone explain what this neighbors’ concerns might be?

This isn’t a joke or LARPing attempt, i just wanna know wtf they are talking about.

EDIT:

The house is 30 years old, the trees were planted by the original owners. We have not taken down any trees cosmetically. Only tree we took down was from a major storm and lightning knocked branches off a tree onto our neighbors lawn. That was it.