tldr; title says it all.
I read the forums most days and the general consensus I get from MMOs is that if your a bad player you are ruining the game for everyone.
I am a former player of Wow let me put that to rest right now. I read the forums to see if the game is moving toward a more appreciable culture. done , now to the point, the normal progression for a player shows that at some point they had no idea what they were doing.
We read the instructions given by the game for basic understanding, we experiment with spells and abilities, we use our imagination, we level, we read up on our hunches about what can be done with a class at its highest level, we go through trial and error, we die, we are the reason for a wipe, but at some point we get better.
We are in the top of the charts for whatever it is that we do, then we feel it is our duty to continue to improve, contribute to theorycrafting, study the highest echelon of gameplay, and become an authority on the game, the raid, the class etc. But all of us, relative to the rest of the community, are miles behind someone in terms of understanding maximized functioning and application of that understanding. To someone somewhere you are bad, you are ruining the game, you are killing your guild, you are being told or at least someone is thinking you should try your hand at something else because this is not going to lead to a happy ending for you.
Why do we beat up on those that are struggling? why do we even care about those that are struggling? When you log in and get ready to arena or raid or whatever, you are in like company, when you step out of that bubble why do you think or anticipate that the rest of the community is in the same boat in terms of experience and study why approach the community with such elitism and hostility? This mind state actually drives the good players out of the community, they drive themselves crazy and have to do something else because whenever they log in they get upset.
(side note) I think the reason for this stems from satisfaction of actually berating another player the way that you were berated, kind of like what happens to kids who are a product of an abusive home they grow up to become abusive themselves. The cyclical nature of this problem, I fear will be the undoing of many games, the next gen that blizzard is targeting with MoP have grown under big brothers and sisters that have grown under their parents IN azeroth.
If blizzard can break this culture it can regain the game, maybe that's why the sudden shift in demographics, out with the old in with the new?