http://screenshots.filesnetwork.com/95/potd/1134695493_73.jpg
It isn't that inevitable.
I have many, many fond memories of interactions in WoW - not just with people I got to know in a way through a server's roleplaying community, but even randomly running across someone while out in the world. I certainly had far more good examples of that than bad ones, more people taking the game seriously and showing the same patience and intelligence that people tend to show in actual social interactions than ones "abusing anonymity" or the like. Despite what everyone says about how the internet supposedly turns people into tactless bullies who love to flame others at the drop of a hat, that hasn't been my experience, just that the bad ones can be more noticeable because they're that annoying. That's when I turn to the many people who aren't like that and remind myself of why I'm there in the first place, and I can just let it go, and get back to enjoying myself; that's why I'm there, after all, not to lock my focus on the ones being annoying.
So you mean like... Skyrim?
That description sounds more like Daggerfall (and perhaps Morrowind), actually. Skyrim's are more like a straight-up questline, while Daggerfall's are literally "grind random quests for reputation (and build up skills), recieve promotions." It works there, though it's a little generic.