[AdamB]

Well, it can be a good way to get rid of a
bandit on your 6, dropping a tree in his path!

That doesnt work either because you can fly through
the trees in cliffs of dover, this was done for performance
issues, i.e. there can be some 10000 trees on you screeen
at any one time meaning an overload of objects and then
a complete system crash

Hope you like

AdamB