Believe it or not, some people actually chain their signs to things.
Box cutters are for illegal banners.


This custom made trunk-sized "Sign Assaulter" - extends to 8' to reach signs up telephone poles.
Can also be used to capture snakes and small alligators.


The original "Sign Assaulter" extends to 11' in length to get really high signs (being careful of electrical wires). Standing on a tailgate, we can easily reach over 20' up.


A simple solution is to use a handle and claw available from Lowes. It can extend to 10'.



Another solution is a saw blade (Sears, Home Depot) attached to a pole.



Saw photos courtesy of "South Side Sign Busters"