Yeah, you see that all over the place.
Just take a look at your average gaming message board and you'll see at least 80% of posters being negative about, well about everything really.
I hate this, I hate that.... That's why for the most part try to steer clear of that stuff.
You might not agree with what you read or hear, but at some level it does affect you even if it's subconsciously. And before you know it the negativity becomes a part of your daily live.
Just like Thor said, even the news does this all the time. War this, terror that, deaths here, murders there. After a while it makes you look at the world with different eyes and you might as well become a part of the problem yourself eventually.
That's why you will more likely than not see me talking about the things I love instead of the things I hate.