Refreshes done via java or other languages are very popular, and have made many people very rich. Look in the adult world, and you will see this is commonplace. Alot of the big players with dozens of domains can afford to have some banned, and are using refresh commands regularly - they dont mind if a few get caught and a few domains are banned. Will I would not call it ethical, I would argue about wether it is effective or worth your time - it really takes no extra time when you know what you are doing, and enables hundreds of content-less pages to be added to the engines. Proceed or don't, but dont say its not worth your time.