I've seen insults flung from both sides, don't get me wrong. Recently as well. But I find the instigation of said insults (meaning the people who initially started it) usually stems from the people who defend Disney, not the so called doom and gloom crowd. Example being that we'll get to some sort of broken ride element thread like Everest, Splash, etc. Then people start to express irritation at the management in charge. Then someone who defends Disney too much comes up and starts hurling insults and telling them they're evil or whatever for dissing Disney and the people responsible. THEN the back and forth starts, but only after you've got the other end trying desperately to defend the Disney corporation by insulting anyone who doesn't see things through rose colored glasses.
Basically I see no reason to get irritated at people who express dissatisfaction with Disney and WDW. If you can't enjoy the place BECAUSE of people posting on a forum, you're being way too sensitive and insecure about things. For example, I like movies people dislike and dislike movies people like. I don't get bothered about people having a different opinion on the matter, I just enjoy what I like and disregard what I dislike. If someone attacks you for it then yeah that would be ridiculous and their fault. But again that's insecurity for you and I really don't see much if any of that happening here from the doom and gloomers side, at the very least not without being provoked first by another person who instigates something.
For example if you've got a thread involving the current state of Expedition Everest and its broken effects (which we do, and which the admin of this site actually created and stickied in this section btw), I see it as both completely fair as well as the right thing to do to express your dissatisfaction with the situation. It's healthy criticism to complain about legit flaws and isn't hurting anyone here, not matter how big or small the problem is. I don't think it's fair or right however to tell people who do this to "shut up and leave if you're unhappy, everything is fine and you're evil for pointing fingers at the heads of the company". I think it's pretty clear what exactly went wrong in that discussion. And that's generally the extent of the argument, personal insults laced with a complete lack of fairness or facts. There's something very messed up about that mentality. We're not attacking you, Disney, WDW, or whatever. We're pointing fingers at the people who are responsible for these problems. Why anyone as a paying customer would defend said people and their actions is I admit completely beyond me.