I think if you want to report something, go for it. The moderators will either agree with you or not agree with you. There's no penalty for reporting posts that the moderators disagree with being outside the rules. So long as you don't care if your reporting accuracy drops below 100% if the report is denied, there's no harm done. I don't even think others have a way to check this % (I'm still waiting on those reporting badges) although it would be fascinating to see the %'s of some I suspect go around and report all the posts of those they don't like personally. Maybe posting these %'s publicly would have the abusers feeling shame and attempt to correct this behavior...