To me a 0 rating means that the episode/movie/whatever had absolutely no redeeming qualities. Bad animation, crappy fight scenes, annoying characters, ridiculous plot, etc. I can generally find something good about anything so I don't see myself ever giving a 0 rating. Even if I hated POD I would have at least given it 0.5 for the cool mecha. But we all have different standards.
Just to add a small note on this and giving it a small rethink I agree.
Especially if the movie in all 80 mins Scott says there is not one decent thing here or the animation is horrid, crappy music or plot idea ect.
So I've thought about WHY I disagree with the review for.