Indeed, people need to observe that god/nature/the universe or whatever it is one believes in, gave us TWO ears, and ONE mouth.
Some people perceive quietness as an offensive trait, that to them means you're pretty much uninterested in what they have to say. But then again, maybe you are, maybe they should be more considerate as to what to actually say and stop blabbering about stuff that don't even have a flake of importance to them!
I agree @sandstrider. Sometimes silence is better than bullshit.