What business does Yahoo have intercepting my click on my HSI provider and leaving a message, "This link is no?

What business does Yahoo have intercepting my click on my HSI provider and leaving a message, "This link is not authorized by Yahoo!" What damned business is it of Yahoo that I am linking to my HSI??? I resent the interruption! You have no idea how resentful I feel! I am no longer using Yahoo search for any reason at any time.