Public relations managers can sponsor events or community activities that are newsworthy to achieve press coverage but at the same time these events...

Public relations managers can sponsor events or community activities that are newsworthy to achieve press coverage but at the same time these events reinforce brand identification. With this in mind companies such as Coke Cola and Pepsi donate equipment for sporting activities in elementary, middle and high schools in return for the school agreeing to put a soda machine in the school cafeteria. Do you feel this is part of good public relations or is it unethical? Please use references with your answer.