First off, this is the best forum I've found online. It is well run and moderated, with many members contributing enormous amounts of information and help.
In my time here I've watched some interactions take place (with newbies, vets, and mods) that weren't shinning examples of who we generally are. This isn't for someone else, it's for each of us. Here's some tips to help improve our interactions here, within the firearms community, and all interpersonal relationships. This is tailored for those moments where a conversation could go south.
1) Everything starts and ends with you.
No, this doesn't mean it's up to you to be the dictatorial corrector of all wrong statements. It means that if a conversation goes south it's on you, even if "they started it"!
2) Check your ego.
When you feel someone came at you, or offended you, or whatever else, then you get mad and your ego is hurt. You can't believe that person wrote that! Stop, take a moment to chill, then seek context. While some comments can come across as rude, abrasive, offensive, and etc., that is rarely the intent. Remember, we are not each others' enemies. The goal of this community, and the firearms community, is improvement and support.
3) Seek context
Once your ego is cooled down. Kindly ask for clarification. Ask why that person said to do exactly the opposite of what you thought was right. They could have different experiences and knowledge that will only expand your knowledge. If they seemed to come at you personally, kindly let them know that it seemed as though their comment was aimed at you personally - as opposed to the content of the thread. Likely, they didn't mean it to come across that way. If they did? Then don't waste your time or emotions on holding grudges and being pissed. Let it go and keep getting after the reasons you're in the community. Stepping back is especially important for leaders. Don't get sucked into the moment and lose the bigger picture.
4) What is your end goal, your mission?
We all have our bad days and when you run into someone who is having one just move on. When you have one, apologize for any mistakes you made. Just own it! Is it worth getting into a confrontation? Is it in line with your objectives? It's weakness - and even a sign of insecurities - to lose your temper. It likely impedes you from accomplishing what you really want, and makes you look childish. If you make a mistake, say something that comes across wrong, or whatever else - own it and apologize for it. Even apologize for a misunderstanding, even if you didn't intend it to be a problem causing statement. Then move on and focus on your real objectives.
There are more principles that can help, but these are just a few that would have prevented most issues I've seen here, and the majority I see in other forums or communities. Feel free to add you're own tips and suggestions.