Topping is Bad

Topping is the practice of cutting a tree down to a desired height.  The cuts made are in the middle of the branch and the hope is that some new branches will then grow at this new height.  It is a practice considered harmful to the tree and is punishable by a fine when done by a licensed arborist.  The tree is never really very healthy again.  Here are some examples of tree topping:

If you are considering topping your tree, don't.  It would be better just to remove the tree entirely.  If you are worried about the height of the tree, or certain branches, contact an arborist and get some advice on how to care for the tree.