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^Agreeing with Wyldesyde.
Let's get this down now: No one here is a legal authority on how cinema is to be handled. It doesn't matter if your a college professor, there are college professors who will disagree with you, and your authority does not come into play outside your jurisdiction (i.e. Movieforums). For all you know, another professor from MIT or the Ivy League could be here. It doesn't matter if you write for a newspaper or magazine. I'm certain more important critics have disagreed with you. In fact, it doesn't even matter if you've been here longer than another user. By that logic, you should agree with Yoda on literally every tiny thing he says since he's the founder, and I know no one here has done that yet.
There is no unwritten law that you have some authority to make a nasty quip because of a movie disagreement. However, there is a written reminder of rights called freedom of speech, which means if you, the unwritten "authority" have the right to do something, so do we innthe event that you are not the other party's written authority. When authority does come into play, that's jurisdiction-based, which means the mods here have the only right to stop certain comments.
On the subject of moral debate (which I am invested in with another individual), making little insinuations cleverly disguised as polite comments doesn't work on anyone who's smart enough to recognize that you are insulting them and pretending you're not. It only allows you to be a target for another lash. It's an adult's reworking of a child going, "but I didn't do anything." Personally, I am very against the idea. If you're gonna insult me, at least be honest about it instead of acting like the lesser of two evils is good behavior based on the notion that if it's a little better than it's good.