Some thoughts as a webmaster and administrator of my own community:
1. I absolutely agree with the above insight that what you perceive to be hostile or rude behavior may actually be cultural or personal differences. Some people may be very passive aggressive. Some people may be very direct. Some people may be having a bad day, and want to take out their anger on you.
2. Forums allow another side of human nature to come out. In the physical world, there are limitations of what is socially acceptable because you get the consequences of it. For example, if you're rude in the real world, you can immediately see the shock, anger, and disgust in the other person's face and you will get immediate visual and verbal feedback. In online forums, you're anonymous so you may feel like you can "get away" with socially unacceptable behavior.
3. I personally write very direct comments on low-value or misleading torrents. There are torrents with bad or irrelevant screenshots, incorrect descriptions, misleading descriptions, or torrents that are 'stuffed' with extra material to get more download juice, etc. I'm not trying to be sarcastic, I'm trying to instill some accountability on the uploaders and to ensure the torrent system stays clean. It helps everyone if you properly disclose the torrent with accurate and truthful information.
4. Finally, there is a system of accountability for egregious behavior, which is the Report system. Use it. No staff can moderate everything in a large community, so the community needs to understand - and to be empowered - with the ability to report malicious or inaccurate information. You should use the Report system, which flags the content and brings it to the attention of a staff member. Just yesterday, I reported a torrent where the description was (and I'm not joking) "omg wow lol muscle".
Joel