The ruling also states that if the article itself is in the public interest (such as an important person being unsavoury), it cannot be removed.

Also, no, you cannot have the late Geoff Greer's article removed, because it's not you. As I understanding the ruling, you can cannot act on behalf of someone else. Particularly not one who is dead.

However, I do agree with you on the problems with implementing such a system, which is why I at least think the EU should be handling the requests and not Google. But even so, while I agree with the principle, there will always be someone abusing the system.