I think people need to realise how impactful their words can be. More importantly, they need to realise how influential their words are.
When people in certain threads slag off the club or its players in an over the top way, they need to realise it has a toxic effect. It might seem like it's just contained to these boards, but there are probably a tonne of people who read these comments that aren't frequent posters, or posters at all. Seeing those comments like that as frequently as they do normalise them and make more easily influenced and naive minds think that they're ok to make.
If lots of people think it's ok, then it's only a matter of time before some of them decide to take it to the next level and go too far with it. And that's how comments go from just discussion between fans to abuse to the players.
Of course, Bluemoon itself has a smaller role to play than the likes of Twitter and Facebook and whatnot. But the fact is that there are a large collection of fans here regularly commenting and it's going to have a greater than zero impact in the wider scheme of things.
I'm against the idea of controlling opinion, but people at least should be educated in how to control their emotions a bit better when online and made aware of things on that front. Ok, we've all lost it here and there and have our own breaking points, but too many get triggered to easily and it creates an unstable and over the top discourse. Getting emotional discussing it with your mates is one thing, but on the internet it's there for the world to see.