I think mostly it is because people join servers that basically cater specifically to them. For example, I'm on infosec.exchange. Needless to say, it is very e

I think mostly it is because people join servers that basically cater specifically to them. For example, I'm on infosec.exchange. Needless to say, it is very easy for me to engage in conversations, and very easy for others to engage with me. In threads where people don't agree with each other, it still manages to not get hostile because well, we're all interested in the same subject even if from different angles. Also, an important feature when it comes to people who might get out of hand on occasion, is that you can ignore (mute) and/or block them for a specified period of time (versus Twitter's permanent-only options). I do that when people post the songs they are listening to in real time, because I figure they'll be done the song list in an hour or so.