Because people are bored.
Alot of it has to do mainly with the nature of people that talk on forums incessantly. Most people join forums and chat on them simply becuase life in the real world has not been going so hot. All humans love to feel important, and through forums, all their posts and topics become important. People aren't worrying about what you look like, what's your background, ect. All they are reading is your post in all of its purity.
Many younger people choose something that they can talk about... sports, video games, music, and movies tend to be popular topics and more recently anime. They want to talk about something they are comfortable which.
So tie that up and you got people who talk on forums for attention and the feeling of importance and they choose gaming because it's something they are comfortable with. They get this feeling of importance becasue they are noticed whether in real life there are so many other variables to it. Thus this comfortability makes people show true colors rather than putting on a show and most people like to latch onto things.
Thus they'll latch onto a corporation they like, such as Nintendo. And they'll show very loyal tendencies toward that company and want to see it do well. Thus these things arise. Not to mention with their new found sense of importance they'll feel a sense of superiority when discussing these things. Thus you'll see a sense of entitlement when it comes to these issue all brought around simply because of the real life's vein and excessive attention to things other than the actual person.
Not all people on forum's are like this but the majority I've met were like that. How I ended up here. Well in a way but that's a different story that I won't get into.
I hope that's all the psychological and philosophical babble you need because I'm good at that and can get into some long discussions if necessary.
